@threeofus I'm no expert, and this is probably unethical, and it would take a lot of effort, but...
Buy a domain like "mainstream media sux dot com" and start an anonymous blog with all the stuff he's been saying, but back-date it so it looks like it came out before he said it. Then tell him you found a site you thought he might like. Gradually start introducing reasonable, level-headed concepts about community involvement, respect for family, or whatever might motivate him to exist more IRL.