No conspiracy. I've had people do that to me and it's annoying. It's not hard to tell when people talk in the same sort of insults.
If I'm wrong here, I apologize. But when two people both start to fling insults at me at once and then agree with each other, I get suspicious. Especially when I've never had conversations with them before, and there's no reason to insult me. Maybe that's just me.