I have a feeling that this kids political motivations are going to stun a lot of people.
And I (as someone who lives in the area and has seen who the shooter allegedly is), have a feeling that we are going to find out that he was bullied, snapped, and took revenge on those who tormented him.
And it is as simple as that. No race card. No political motivation. Just a nerdy looking little guy who was presumably bullied and snapped. (That said, pure speculation on my part, but based on what I've seen on social media, quite likely).
Maybe he was mercilessly bullied. Not an excuse, but not a political motive either. I do not think kids of color get bullied in white majority schools, at least I never saw it.