Doublethink.
It isn't, of course, but remind yourself that we haven't killed anything on the order of a million Iraqis; that's simply a number some propagandist picked out to sound good. How many people believe it, though? (Please, don't rejoin that "our" trade embargo is responsible for Iraqi kiddies dying from lack of medicine in those numbers - for one thing it isn't "our" embargo, it's the U.N.'s, for another, such numbers are purely speculative in any case).
And, by the way, not everyone in Iraq mourns the demise of the Republican Guard, those that actually did die, that is. They were noted for their enthusiastic repression of the Shiite population, at the very least.
But other than that, I agree with you, at least insofar as there's actually U.S. foreign policy activity that people don't like. Lots of people; you can't please everyone, but not everyone responds by murdering 5000 innocent people, and we absolutely have not. I'm not buying the moral equivalency of that activity with the pitfalls and mistakes of five decades of U.S. foreign policy, it's simply not the same thing.