If you can find any evidence to indicate that "we knew" anything of this sort, then present it here. Otherwise, there's nothing "factual" about what you've posted -- and saying that something is "self evident" does not make it factual.
This also, at least to me, makes it self evident. The Mid East is rife with islamic fundamentalism. Establishing our presence and the opportunity for a free, self determining and secular regime in their midst is bound to attract those so fundamentally opposed to it like flies. The founders of our nation indicated that certain truths were self evident...you and I both believe that they were and are. I believe the same regarding this issue. In the same manner, it is self evident (at least to me) that if we go into Iraq that the other fundamentalist and terror supporting elements in the region (ie. particularly Syria and Iran which Iraq is nesteld right in between) ) would respond. All you have to do is look at a map and consider the nature of the geo-political situation.
Anyhow...as I said, it appears we disagree and that is fine with me. It is both of our right. I am content to let others read and make up there own minds as I am sure you are.