Exactly what you said. It's what I warned them about when they were kicking people off forums. Then, I watched them get shocked over and over again by both the AltRight and Trump support. They had no clue how any decent person could do such a thing. That's because they weren't listening to them and even kicked them out of the forums.

Had they been present, they could've weakened the support a bit on the more moderate ones. At the least, whoever they propped up would reflect less-extreme views of their supporters. Isolation only makes bad things worse.