This is being organized. They waited for the opportunity and this was it to exploit.
Please prove me wrong.
Granted I'm speaking from one viewpoint but that's one thing I've noticed all over social media is that during the daytime protests have largely been peaceful with no real violent altercations (at least compared to the night time), but once night hits, a growing number of rioters appear to be Antifa. Not only that but that's what a lot of reports are coming out saying that there have been people in crows encouraging mass vandalism then running away as soon as media attention or LE showed up.
