Saying Black Lives Matter is not saying that all lives don't matter. People with white skin are not at a greater risk of being killed because they have white skin.
That isn't 'pc'ing' anything, it's saying that there is evidence that there is a problem, let's address it.
It's honestly bs that it's anyone's behavior, I shared an article a couple of days ago about white cops shooting a black 12yr old, he was playing, they didn't even speak to him. They got out of their car and killed him.
Behavior? A guy commits fraud and that behavior is enough for him to be murdered by cops?
White cops kill a disproportionate number of black people, those black people are not behaving differently from the white people that the cops arrest.