I think it just runs a lot deeper than anyone realises. As a couple of the community leaders (and maybe the diversity lead?) pointed out, people of colour carry both the current and inter-generational trauma that racism causes. So they are more likely to react and defend themselves as a consequence and probably faster than someone else who doesn’t carry that trauma. And then they are perceived to be ‘angry black people’ and so they need to be even more on their guard to defend themselves the next time and so the cycle continues.
There is a current enquiry into the death in custody of Sheku Bayoh, police were called to him having a mental health episode and then he was so horrifyingly man handled (literally) by the police that he subsequently died. I think he was a tall guy, he was in the throes of a psychotic episode or something similar, the police report had said he may have been armed with a weapon, so yeah, a level of restraint was going to be needed for his own protection probably than anyone else. But, I’m also aware of plenty of white guys who have been in the throes of mental health crises who have had to be restrained and have fought against the restraint and have been armed and are still very much alive to tell the tale and unharmed by it. The years of investigation into his death uncovered that one of the attending PCs was so outwardly racist that his own family have spoken up to the enquiry about what a racist POS he was. Some people seem to see how people of colour behave as somehow being more dangerous, more erratic, more negative than we do a white person exhibiting and doing the very same things and it’s really not ok.