I am very accostumed to that childish knee-jerk mentality. For example, when it comes to the Brittish empire, there is positive effects to be accounted for, but the image of that empire is so rosy and white washed. Whenever I bring up the fucked up shit they did as a colonial empire (only empire to completely erased a group of people in Tasmania, first to use concentration camps etc), I have gotten similar stuff as you just did, listing the "wonderful" acheivements and pointing out how others were worse blabla, not even been close to acknowledging the dark deeds.
Weird as mentality, might as well close your eyes, scream lalala and ignore the pink elephant in the room. Revisionistic mentality sucks real hard. Wether its for the west or the east, doesnt matter fuck all.
P.S But even I am use to that kind of argumenting, the scale of this one is utterly ridicolous. I mean to even come close to thinking you can justify killing 70m people is just.....