That's the neat part. They're not happy.
They're utterly fucking miserable and addicted to the little neurochemical rushes that being angry all the time give to them. Hate can be addictive.
I have relatives that are full blown fascists. I'm talking the type that get mad at Indiana Jones movies for being Jew-created anti-nazi propaganda (just about a direct quote there too). They're utterly fucking miserable and contagiously so to the point that I admit it helped contribute to my decision to move to the opposite coast and start over there with my family just to be physically out of reach of their radiation emissions.