AntiFa probably. That’s their M.O.
I doubt that.
These are just "useful idiots", snowflakes, who have been emboldened by Antifa's ability to raise holy hell without fear of recrimination. Antifa will become ring-leaders of the disorder that will assuredly accompany the RAT convention. Just like the YIP(pies) like Hoffman, Rubin and others did in 68.