Outside of coaching, Mourinho is just a huge troll. I don't think he believes a word that comes out of his own mouth. He's constantly trying to "out smart" people even when it's not needed. But there's no risk for him. He can say what he wants, if it puts the opponent off their game then he wins, if not, no harm done to himself since he doesn't give a F.
The players never feel any pressure since he's target #1, maybe more-so in England because they're a bit more sensationalist than Spain IMO.