thats not entirely true though phaenx
the era of isolationism was shattered by world war 2 because we thought we could stay out of a
global war even though we were a pretty key figure / a roadblock to the goals of many nations...
and it effectively ended with the attack on pearl harbor which was attacked by a very different force from terrorists...
now im no supporter of isolationism but i do think that a lot of hte interventionist policies we HAVE been doing over the years haven't always been the greatest things to do...
isolationism in the form of not being involved in a lot of issues (not to mention israel being at the top of that list) probably would've stopped a lot of terrorist acts but who knows what the alternative is really anyways... no other dimension to find out (yet)