"ER" is simply self-defense; it is perfectly legal to protect yourself from dangerous individuals by killing them.
Ideal Hypothetical:
I've been bullied countless times over the past decade. I am an ethnicel. If a privileged White femoid like Shannon Rose Bosanac were to approach me violently, I would have perfect legal recourse to use my personal firearm to shoot her to death.
Shannon's White European features and countless friends are meaningless when the law is involved; I am free to kill an immediate threat to provide myself both physical safety and psychological relief. It makes no difference how "wonderful" of a person S.R.B is if she threatens my rights as a citizens. Simple.