First, there was no vote for war. The vote was to authorize Bush to go to war if it were warranted. We now know that it wasn't warranted, and that Bush knew that. He made a knowingly bogus case 'cause he wanted to attack Iraq.

Even if one were inclined to give Bush the benefit of all possible doubt, he did not exercise due diligence in investigating the reasons. And if one avoids due diligence, one is responsible for what follows. War is serious, and the vote assumed an honorable president.

Again, no one voted for war. They voted to authorize it if necessary, and it wasn't remotely necessary on the grounds given.
(And Saddam's inexcusable cruelties were to prevent a civil war, the same reason the US is perpetrating inexcusable cruelties.)

Second, conservatives love to call the slaughter of innocents "collateral damage". Strafing villages for 4 hours in Afghanistan, unarmed villages, killing 45 people, is slaughter. Dropping 500# bombs on a city from which residents are prohibited from fleeing is slaughter. Even if not prohibited from fleeing. Using white phosphorous on civilians is slaughter. And "Shock and Awe", big bombs dropped on a civilian population, is by definition terrorism.

Etc.

And last, it's hard to feel sorry for folks who advocate the killing, torture, rape, looting, destruction and other atrocities in an unwarranted war when they are called on the carpet for that. You think we all should promote such cruelty? Or not be outraged at such cruelty and frustrated with the cold and callous folks behind it? You think they deserve a free pass?

Arf