He has motivated a lot of people, including myself, toward exploring Christianity. If you were raised in a purely liberal/materialist/anti-theist upbringing you don't have a framework from which you can honestly investigate sacred ideas and concepts. JP can start the ball rolling without triggering the embedded liberal "failsafes" that normally shut people down.

He is also a gatekeeper against the "far right", as in logical conclusions that commies don't like, but by the time people going that direction run into the gate a lot of them are much more willing to look through the fence toward the other side.