First of all, fohpah? If you don't know, google is your friend.
Second, I've totally got Will's back in the literal interpretation that the remark uses Hitler as a chronological marker.
Turn off your kneejerk for a moment, and observe my handy visual aid:
This is an awesome graph of bad things that have happened to America over time. Here are some true things you can say about this graph:
Bush is the worst thing for this country since Adolf Hitler
Bush is the worst thing for this country since Hippies
Hitler is the worst thing for this country since Great Depression
Hippies were the worst thing for this country since Hitler (until Bush)
etc etc.
All that statement means is "Starting immediately after Event B, there is nothing worse than event A for our country". It doesn't give you any relative measure of badness between events A and B.
edit: Holy crap, thread has moved significantly since last page. Why didn't I see it was two pages? Feel free to disregard.
