They don't want to discuss genetics and they don't want to admit that saying that some genetic groups are more violent than others doesn't mean that every one of them is violent but that a violent behaviour is more expected by those groups and this is clearly visible by all statistics. That doesn't mean to be white supremacists or neo nazis as they would like to labels everybody that had a brain to think and eyes to see. The reality is that one dark skin person could be a very good person but every single society with a majority of them turns to shit.