My dad is a right wing obsessed with American politics. I don't consider it a deal breaker because he doesn't vote in any elections and ultimately doesnt hurt anyone. However i have lost a lot of respect for him as a man and I think he's stupid for believing the nonsense he does.
If this was a friend I would not remain friends with that person. The company I choose to keep reflects me and I learn and listen to those people. I expect a certain level of morals and intelligence from my close friends.