Armed people chasing
I guess this is the bit that's not exactly black and white, the video doesn't seem to show any guns/weapons, certainly not being waived around - and the chasing seems more like a kind of childish 'in-your-face ner-ner' type action (even the white car that got hit by one of the pickups looks to have been trying to squeeze between the pickup and the bus without enough room).
I hate feeling like I'm defending Trumpists, but also don't like this kind of hyperbole in already uncertain times - feel like it can prompt unnecessary escalation (if they're bringing guns they we'll bring guns too etc. etc.)
hope that doesn't sound too both-sides'y..!