Goading

My partner goads people for a reaction and when he gets it he thinks it's funny. It promotes a lot of distance between us and he never expresses his real feelings. If he sees someone who is emotional he looks uncomfortable and belittles it with humour. His family is the same, they say stuff to each other, sarcasm etc. They are clearly hurt but pretend not to be, their anger then comes out behind the other person's back in slating them and never telling that person how they actually feel. Is that ADHD or something else?