Theoretically you’re right but you’re denying the reality on the ground, which is the context of the debate and which you are taking out. Sure, cops are not allowed to kill black people but the reality is that black people are being treated unequally and that can be statistically backed up. I keep hearing arguments like what you mentioned and I can’t help taking it as a dismissal of black people’s struggles and an unkind disinterest to suffering that you do not personally experience.
And if a black person does kill someone you love, why would you even think about black people in the same way as cops, when “black people” aren’t some public entity armed by the state to do the job of protecting people of all colors? You’re misrepresenting the issue. The only way to channel your hatred against an ethnic group that doesn’t have statutory power over you is to become racist.
But they de facto are in many cases. Cops can generally kill at will and without real justification and not face consequences. It's only in rare cases when public outcry is enough, like in the slaying of George Floyd, where prosecutors will even attempt to hold cops accountable.
And if a black person does kill someone you love, why would you even think about black people in the same way as cops, when “black people” aren’t some public entity armed by the state to do the job of protecting people of all colors? You’re misrepresenting the issue. The only way to channel your hatred against an ethnic group that doesn’t have statutory power over you is to become racist.