Please don't take threads on pointless ideological tangents. You are welcome to not like BLM, but you should know that there's no good outcome to litigating it here.
Currently the left in USA seems to conflate freedom of expression with freedom from different opinions, and, at least the mainstream left, seem to want more government involvement in the policing of speech.
So again, all of this matters, because it shows how they do, or might, define what their principles mean to them versus what they mean to you or me.