I've never understood why 'Black Lives Matter' is such a 'divisive' slogan. It's not the kind of statement that one would assume implies its contrapositive. What I don't like is the attempt to make it--'Black Lives Matter' specifically, those three words specifically--a shibboleth on the left the same way 'radical Islamic terrorism' is on the right. It smacks of something that's becoming a thought-terminating cliché. It's not like we're trying to ascertain whether a valid baptism happened or something.
because large swathes of the population think that black lives
don't matter (or at least that they matter less than having an undelayed commute or w/e). no need to overthink this.