It's gang-related apparently.

Twitter is full of racists, bots and paid keyboard whores talking about "these people", "this culture", "the usual suspects" and the rest of their repertoire. They never appear when some White dude shoots up a church of course.

It still boggles the mind that the US accounting for about 70% of mass shootings wordlwide still seems to be this quantum physics problem they just can't get a handle on. Why does it happen so much here? It's a mystery. Well maybe being able to buy an assault rifle when you get milk might just have something to do with it.