The cause is higher levels of testosterone amongst blacks and how their amygdalas are wired. Both fear and anger are controlled by the amygdala. Some people are more wired to high inhibition and fear, hence incels. And others are more wired to anger and aggressiveness. Blacks have no fear. They were bred to fight and hunt and be violent. A black amygdala only knows anger and violence. You can't scare a black. You can only stop them. Again, showing that blackcels are fakecels with their high T, low inhib, tall height, and no fear.