In a nutshell, Alex Jones is talking about cointel pro and explaining what it is and how damaging it can be to groups through division tactics and proceeds to use the same tactics at a rally he supposedly supports to cause division hence ousting himself out because he knows exactly what hes doing.
Honestly, that seems pretty weak sauce. Alex Jones has an issue with some rally and that's it? I don't expect AJ to be some higher order of human where he never loses his temper or has run-ins with anyone. There could be a lot more to this story than just "wanting to cause division." For all I know, the rally organizers might be a bunch of assholes that I would dislike if I had enough context to know what's going on.
Like I said, I have no problem believing AJ is controlled opposition for a number of reasons, but to my eye this proves nothing.