AlmightyKfish
This Is No Longer A City.
Surely there's not much to say- some people are not very nice. Take a random sample of a big movement and you're bound to find people with extreme/distasteful views.
Literally any group- protest group, political party, religion, school, whatever. I mean that link even says 'A small sampling of the tweets', ie not a majority and certainly not the views of the movement of a whole.
That hardly invalidates the fairly understandable worry of other people in the BLM movement that they and their families are more likely to be killed by police due to systemic racism in some police departments.
Some people are awful in the face of tragedy, hardly a reason to dismiss an entire movement as insane terrorists or whatever.