If he's doing it out of worry for you because he truly believes that liberal nonsense then at least his heart is in the right place although he is misguided. Otherwise, if he's doing it to be combative and to annoy you than that's just fucked up the way I see it.

That being said, you seem to care about this person and your friendship, and I think it's best to be able to talk to him, at least a little. Also, don't try to walk on eggshells too much by avoiding to speak your mind out, that's something that didn't go well for me lol.