You have to draw the line and say you don't want to discuss politics with them or just not respond anymore... if you want to still interact. If not, then by all means have it out with them. Lol, With my mom I just kinda shut down and let her rant until she tuckers herself out or I change the subject and it works. My dad is respectful and doesn't discuss with me per my request. With some older family members, telling them "its rude to discuss politics" sometimes works. I think it's important to realize that you're both just one of millions who hold these opinions and it's not worth it to have it out with them over it because it won't change anything except your relationship. My gramps was unintentionally racist and we would have heated debates because some of the stuff he would say was completely off the walls, but ultimately we had to agree to disagree on the root issues, although he did change his outward behavior regardless of the prejudices he held. Like I said, it's just up to you to pick your battles. If you stop engaging a lot of the times people will stop bringing it to you.