Alright, well she can say what she likes. I usually try saying that millions of lives have been destroyed. Even if it had been half a million, it is no trivial matter, especially considering the 5 MILLION REFUGEES. I just don't think it's a matter that ought to be taken so lightly, whether it'd be millions or hundreds of thousands, or even tens of thousands. You just have to look at the scope of it. Let's say it was "just" 500,000. That's 1 out of every 60 iraqis. With 1,000,000, that's 1 out of 30. One out of every thirty people you've ever met is dead. That could include your family, people you live with, people in your neighborhood, people you went to school with, people you worked with. If they're 'lucky', they've forced themselves into exile. Exile is no trivial matter either. Internally displaced? Well, if that is trivial, then I guess Katrina was of no importance either. The effect of the refugees is probably even more devastating than that of the dead, in either case, both for Iraq and for the whole region.
As for the VAST majority, again, I don't know what percentage have been directly responsible for which, so I wouldn't make a claim. One of the sources I posted put the causes of death at 6% for both car bombs and aerial bombardments, but by far the major bulk was gunshot wounds, which could be from either side.