That is a pretty ironic comment because that is not what the paradox of tolerance is at all. The paradox of tolerance is that intolerance needs to be suppressed for tolerance to exist, since tolerance can’t exist alongside intolerance.
The paradox is that tolerance needs to be intolerant towards intolerance in order for a tolerant society to exist, literally the exact opposite of what you wrote.
He has been insane his entire life. He just is at a point now where it gets to unfold much more freely than it ever has, because he has been crowned de facto king of everything.