I don't see any self-conflict in Saturnus's post.

Mohammed might have been a prophet but the way he proved that was with miracles, kind of like David Coperfield with magical tricks, but for different reasons of course. No one is humiliating anyone by simply comparing what they both did.

Saturnus makes a great point about feelings being misleading. Many Christians also say they have "Jesus in their hearts" or they "feel the presense". People just say those things, because they are so infatuated by their beliefs.