If you ever debate a White nationalist online, they'll play the same card every time.
1. They'll admit to being responsible for individual murders or multiple holocausts as a race... Maybe they'll deflect on the first 3 holocausts you mention, some citing that most native Americans died from diseases that they carried...then after you prove the 5th or 6th holocaust it's like

Alright, alright, we're evil...
2. But not before demonizing the deceased..
B-but he had a criminal record
B-but those people were savages anyway. I've heard this argument to justify cimes against native Americans, blacks, Muslims, Asians, etc.
Technology is a trade-off for your ancestors being raped
They MUST justify their evil deeds at every turn.