While that's factually true I have to guess you may not be in the US or else possibly weren't listening to George Bush's speeches and reading the all the media hype leading up to the event.
There were no shortage of "Because Like Hitler" and "Neville Chamberlain" type arguments being bandied about and the situation was not even remotely similar.
Point being, this kind of rhetoric (in addition to not being a solid argument) is dangerous and easily slips into justification territory. (As we've seen). Cases should evaluated on an individual basis.
What the Iraq war (just as the Afghanistan war) has lacked and still lacks, unfortunately, is a post-war strategy similar to the Marshall plan...