I dont disagree that theres racists who want black people hung without due process, but for the last 15+ years, theres a lot more racists who want white people hung without due process.
If the races were reversed in this scenario you would have millions of BLM protesters saying the black person is innocent no matter what, and has the right to attack or kill white people.
We also have the situation of Michael drejka which, predictably, the same people backing Anthony in this scenario, refuse to back Drejka in that scenario because he was white.
Self defense only allows you to use force dependent on how you were attacked and if more attacks are incoming. You cant stab and kill someone because of a minor shove or grabbing your backpack. The other thing is Anthony wasnt authorized to be at that location. Normally, you can absolutely use force to remove someone from a place they arent supposed to be at. In this case they were on school grounds, which is public property. But just because its public property doesnt automatically mean you cant use force to remove someone from it. Even with public property there are situations you can use force to remove someone:
Still. Its completely hypothetical for anyone who supports BLM to be involved in the debate over public vs private property. If the races were reversed there would be major protests and property damage even if Metcalf was arrested