I'm on it...
*Watches some interviews*
Okay first of all, you guys are trippin' if you think he is a P, you can feel the boundaries this guy is setting.
He is an INFJ, and he is super adversarial, this is a very angry man. He uses a lot his Ti which is why he seems so stone faced, but it is pretty clear that this guy is a J. The way he uses his Ti is to set boundaries, "You can't move me" essentailly is what he is saying with it. This is not how an Adaptive P would use their Ti, well, not usually anyway.
Also the way he is answering question is just straight "this is how I see the world", he is not seen going very deep into his Ni, but almost all of his answers are based in an Ni worldview.
ISTP kind of make sense, but they saw the right functions in the wrong order.