In retrospect, it was 100% a CIA agent.
There was a trap where there was a discussion going on between an apparently "stupid" right wing man and a left wing man arguing with him. I joined the conversation and soon I got my own agent keeping me engaged. At this point someone in chat said "Hi, CIA" and left. The arguments were strait out of a playbook, just stupid double-think and logical fallacy to make me angry. I kept winning the argument and he kept trying to insult me for using an anonymous account and trying to get my personal info and get me to link to facebook. This other guy kept asking "what are you doing about the jews/blacks/mexicans irl then?" to get a confession out of me. I held my ground and eventually they just started using insults like TRUMPER DUMPER INBRED HILLBILLY RETARD and even brought in more accounts to make it seem like I held the minority opinion.
It all checks out. I'm on a CIA watchlist now.