falling down a rabbit hole means, then yes.
If he’s disagreeing with policy or a topic like immigration or student loan debt then it wouldn’t be a rabbit hole.
However if he’s using a false or invented topic like “grooming” then he’s just delusional or following the fake rage of others.
But none of what he’s posted other than spouting rage points is a “rabbit hole”.
And you agreeing with his rage is just more of the same.