Uh, Saddam started the entire situation with us and Bush JR just finished what his daddy failed to do.
No, not really.
Saddam invade Kuwait. Not our problem. We didn't have a treaty with Kuwait and it was kind of hard to feel bad for Kuwait, since they bankrolled Saddam when he was invading Iran and failing miserably. Our ambassador, April Glaspie, told Saddam we didn't have a dog in his fight with Kuwait, which he took as a greenlight.
Bush-41 had the good sense to not go to Baghdad because he didn't want the EXACT mess we ended up with- a long, costly occupation that left the Shi'ite majority in charge and made Iraq a natural ally to Iran.
But then something funny happened. Bush-41 got voted out of office, and Bush-43 blamed Saddam for some reason. And he was going to get that Saddam guy.
Which I personally have no problem with. Saddam was a scumwad, and his taking a dirt nap isn't a bad thing. The way it was done was grossly inept, though.
Now we are stuck with an Iraqi regime that is going to be an ally of Iran, probably giving them at least a half hour warning when the Israeli jets are coming.
More to the point, if Israel attacks, that will put the whole Islamic World in Iran's corner. Shouldn't be, but it will, even though they all hate Iran.