Your dad is surely still suffering from this loss and if I had to guess, is probably awfully lonely and misses you. Life is too short to estrange family members over their political beliefs. Have you tried finding common ground in other areas, or asking your dad not to talk about politics? Along the lines of, “I miss you but your politics drive me crazy, can we hang out and not talk about anything political”?

If your dad can’t agree to be apolitical when you spend time together then it’s his choice to be estranged from you. But maybe he can, and maybe you guys can find a connection again.

I speak from personal experience here. I hope you’re able to find some reconciliation.