When he is watching Fox News again all red in the face full of hate... turn the channel to sports. Even violent sports like Mixed Martial Arts will lower the rage some. Football is good too. The poor guy is going to have a stroke or heart attack.
Rush Limbaugh also gets him hating everyone but white men... conservative white men, so when the radio is on and the blowhard is blowing bile... change the station to something more soothing, something more calming like Pantera or Motorhead.
When Ann Coulter is screeching again about traitorous liberals, or illegal immigrants, or Obama... when any of the other hate merchants profiting from your guy's hate get him boiling about some other outrage... change the channel to something more easy-going like a gory horror movie.
Please, we are counting on you to drag your guys back from the edge. They have been fed this manufactured hate for 20-30 years and are now too blind to see. Would certainly help things around the house for your family too. You can do it, and you won't be alone.