bem

Thanks for your effort. I appreciate it very much.
About Muslim countries, they all were occupied by Western Calender Nations, except Iran, and they all use a western calender for everyday life, with the holidays going by the Muslim calender. For example, since they go by the moon, the Ramadan is in a different time of the year each year. They fast of on every season, but they pay their taxes in the same season every year.
Also, Sep 11 is believed by some to be a kind of holiday in Egypt, and some of the 9.11.2001 attackers were Egyptians.
Also remember, that as far as terrorist go, they are more in a cross-countries-world, like when traveling, than in one country, so like when you travel more you use the western calenders and money, much more, so do terrorists, for across-states-coordination-and-activity

I have to say I myself was never too much obsessed with 9/11 combos, and the only thing that really caused me to say "what's going on ??" is that it's a destruction date in two different calenders.

Now about your dates:
All those massacres are not major destructions at all.
Most with less than 2000 killed.
And what is DESTROYED ?
Babi Yar is a horrible day but its date is not a memory of destruction in Jews basic destruction concepts. It's a part of 6 years of a much much greater destruction.
I'm a Jew and I heard about it only when I was 16, more or less.
And you can even see some kind of a combo here, no ? 9/1941 ?
The same goes for the Tianaman square massacre that started on 5/15/1989
From all dates you gave, only two are about the destruction of an airplane, and they both have a combo:
11.23.1985
12.21.1988

First WTC bombing is not a destruction, and few died.
Berlin and Bombay bombing killed less than 200 people together.

And where is the Destruction Element in your dates ?
Please see how much major destruction is in the following:
Destruction of Both Jewish Temples, Desturction of Jerusalem, Exiles, Destruction of WTC, start of WW2 and WW1, Crystal night is a destruction memory which signifies the beginning of the holocaust, in which many many glasses of windows were DESTROYED.
All this referring to a great destruction of BOTH human lives, AND the loss of matter.
You call 911, when you have a problem with your life or with your stuff.
When a President is murdered, The feeling of destruction is greater than in the murder of 150 people, sad as it may be. Somehow everyone feels it's not like one man died, some thing else is lost or destroyed for the public.

Now again, suppose all your dates are valid ones, all with a great destruction, do you see any pattern in them that is more obvious ?
A 9/11 combo doesn't have to appear in all destructions in order to be "the destruction combo", it just have to appear in more than any other combo.
One interesting thing I saw in your dates, (not 9/11 or 2012 related !!) is that in many, digits appear twice at least twice, sometimes 3 times:
4/28/1628 (two 2's two 8's). 12.21.1988 (3 duos), 5.15.1989 (start of Tianman square mass. also 3 duos), 12.29.1890 (3 duos), 3.10.1906 (2 duos). 4.13.1939...
This might appear as a bigger phenomenon, or as a coincidence,
What's so special about 2 duos or more ?
In such dates, most digits are repeating digits, not different digits. Out of an average of 7 digits, at least 4 are repeating. Maybe this can cause something ? It's quite normal to have so many duos, but maybe in such cases "weaker" cases of a 9.11 combo can become "stronger", just maybe.
And I say that, because ALL the dates I gave for destruction with 9.11 combo in the western calender, have at least two duos. (once you have 11, you just need another duo, but I got it every time in my list without even looking for it).
Many many dates have duos, but even if most have one at least, not all have two duos, but all my destructions dates do. Maybe this is another criteria. Thanks.

Is any of the dates you mentioned is remembered by the date ?
Do people say "remember 2.28 ?" like they say 9.11 or the Hebrew version of it ?

4.5.1986 was almost for sure chosen for time reasons, since it's a 4.5.6.

And about 1941
The only year in time of WW2 with a 9 and two 1's .....
Pearl Harbor, Babi Yar, first extermination camps built, and the holocaust is going to its peek.
If you check wikipedia, it somehow says (not me...) that the first extermination camps were already built by 11.1.1941.... check it out.

Now let me explain the 2012 phenomenon from a different perspective:
See how much analogy between 3 different calenders and End of the World theories.

The Christian YEAR ends, and its most symbolic celebration is Christmas.
The Birthday of Christ.
Christian versions of End of the World theories, talk about a future in which Time will End, or it's called The End of Time or The End of The World, or judgment day, and so forth, and it will also be the time Christ will come to the world, with the perfect analogy of birthday and coming to the world with the End of the Year and the End of Time.
In the Hebrew Calender,
Ninth of Av, The Hebrew 9/11, is the formal destruction day of the year BUT in the End of Times, It will become a day of Joy, since it's also the day the Messiah will be born
(accepted Jewish faith, not all believe he will be born on that day even if he comes, but all know it's the only date in the year considered as a potential birthday of his).
This is about 50 days before the Hebrew New Year.
And in Jewish versions of End of the World theories, The messiah will come at one point near the End, and than there will be some stuff going on like building of Temples and maybe wars, and a religious return, and stuff like that, and then we'll have Heaven on Earth or whatever, and even a final judgment day where it is decided once and for all, who goes where.
There is some distance between the coming of the Messiah and the Final End, as in the year they are about 50 days apart.
(This is in complete accord with this version of the End: at the Hebrew year 6000 he will come, and in 7000 it will End.
6/7ths of the time is before the coming, and 1/7th in between the coming and the End, in this, quite common, version.
The average Hebrew Year, has about 354 days (only adding another month every few years).
So 1/7th of 354 is about 50 or 51.
If we take the Year, and "cut" it with this 6/7 - 1/7 scale, we get 50-51 days before the End. you guessed it. Ninth of AV (Like 11.9th being 51 days before 1.1, if both 11 & 12 months are 30 days, or 30 & 29)
Even if it's 2 days before or after Ninth of Av, it's a superb analogy.
After 6/7ths of the Year, and of the 7000-years-calender, It's the Messiah's Birthday or Coming, and after another 1/7th of the Year, or of the 7000-years-calender, you reach the End.
And what is the the Hebrew Judgment Day ? Again you guess it right, New Year. 1.1.
So when the cycle of the Year or of The Calender is over, you reach The End, and Judgment Day, after the messiah was born or came, after 6/7ths of the way.
The fact that in Christianity, the End of Time effect is much shorter in expected duration, is not only reflected in the Year, but also because In Christianity the Messiah is God, and in Judaism he's not considers as God.
How does this fit together so far about 9/11's and 2012 ?
As I showed, after 2012, we'll have much less dates of 9/11 combos, so, hopefully, much less destruction, and as a direct result, more days days of Joy, as "prophesied" by the Jewish religion, in saying, (about the Hebrew calender...), that one day the 9/11-destructions will be gone or over or happy, or generally: LESS 9/11 destruction.
How does this fit with the Mayan Calender and its related-End-of-Times-Theories ?
Basically it all seems like that the End of the Calender FEARS are actually pretty much an extension of End of the Year Fears.
Many people have some fears before the year ends.
Time is going by, and you are forced to recognize it once again in away that shows you you're not here forever.
You can party with the family and friends and love but some people will still deal with fears coming out.
Now project that, to a bigger Ending of All Time.
It goes by the same symbols, as far as End and Redemption and even Judgements go.
And the Mayan Calendar, don't just end every year, it ends in the far far End.
All collective obsession about 2012, is the same kind of obsession about the end of the year and the end of times in Christianity and Judaism.
And the mayan Calender is just like one big year anyway, it has an End and it starts over.

To Leto:
If 9/11 symbolizes destruction in some calenders, spreading more and more in the world as an accepted symbol of destruction, this is how the effect goes.
If Japanese people are less connected to the rest of the world, they are less connected to global symbolism (see my pareidolia post). Also, if they 9/11 combos" cause" destructions sometimes, you should consider the Japanese calender, maybe there you'll find some basic pattern of number in Japanese destruction dates , that matches some conecpt of destruction for the Japanese person, and maybe even some 9/11 combo hidden there after all for The Japanesse as well.
Just maybe
But still.
I don't claim it's that global, I just claim it's common enough to be the most common, and eventually, after many many years, become an accepted concept of destruction as it appears in dates, in more than one calendery system.