i dont think people are mad that he doesnt speak on our behalf. its that he doesnt speak on his own behalf. hes british as well as black is he not? he recognizes how hard it is being a black actor in the uk, he takes roles about the diffuclties of being black in the us, yet, he doesnt want to talk about what it means being black in this world. why?
But then many here would just claim that that racism in the US is worse than racism in the UK so he doesn't fully understand racism. I think that was the general consensus in the Samuel L. Jackson thread about Kaluuya.
Also, he has spoken about the difficulties being a black man from the UK in the past. It doesn't mean he needs to talk about it in every single interview.