I mean the answer is really obvious. Fox and right-wing news outlets in general are designed to elicit strong emotional responses with the stories that they run and how they run them. It is, without exaggeration, literally - in the classical sense of the term “literally” (fuck I hate that I have to specify that now) - the daily hour(s) of hate. Strong emotions elicit the release of dopamine. This is why it “feels good” to many people.