(According to estimates over 30 times more innocent civilians died in the Iraq conflict than died in 9/11 attacks [1])
As for the holocaust, I'm not sure what point you're trying to make. My point is that allowing yourself to get emotional, even when you think you're right, is how all of the tragedies of the world happened (including the Holocaust). Those German soldiers thought they were doing the right thing, because they were swept up in emotion. Not because millions of evil people were all born at once in Germany in the 1900s.
[1] https://en.wikipedia.org/wiki/Casualties_of_the_Iraq_War#Ira...,