Maybe they are downvoting you because you're comparing the death of people killed by terrorist and the ones that died as collateral damage in a war.

Both are tragedies but both are different.

No, they aren’t - the difference is all about formalities; from the moral standpoint they are precisely the same. It doesn’t matter if you go killing innocent people because of religion, political interests, race, or money.

That's where you're wrong. The US never went to kill civilians, the terrorists did.

If that's true (which I doubt), the US military is fantastically bad at their job.

Low estimates of the cost of the Iraq war put it at 185k dead iraqi civilians.

I believe that it is much more likely that the US military simply doesn't care much about civilian deaths incurred whilst it seeks useless vengeance. This satisfies Occam's Razor, too.

There are always innocent casualties in war. The US knew that full well, and decided to go anyway. They went there to kill terrorists and civilians.