You're right, and that's my whole point. Don't get hung up on the minutia, let's look at the big picture. No one is going to agree on all the small things, but we can agree that the government has gotten to be a huge hog with a gun, feeding at the trough of our labor and liberties. (did I just say that? that sounds wacky even for me.)
And since Iraq broke treaties and sanctions and fired on our planes etc etc, you can say we didn't initiate, we just continued the war from 91, when the peace treaty was never followed by Iraq.
Libertarians agree on legalizing all the consensual "crimes", because they agree on the principle of non-initiation of force. Disagreeing on legalizing heroin, for example, probably means disagreeing on the basic libertarian "enabling rule" of the libertarian vision. Not small stuff.