Personally, I don't even understand how a raging liberal could even be attracted to someone like that in the first place. It just doesn't compute in my mind. I couldn't even pursue a friendship with someone like OPs boyfriend, let alone date them (then again I'm gay and there's not many conservative gays where I live, lol).

Anyway...

Look, I might be harsh here but I don't see how this could possibly work long term. Other people have already gone over why, but I'll also state another reason - that I don't see how his extreme views are going to always be contained in every social situation. Since you're currently relying on the fact that they are, because you state:

That said, he is nothing but polite when he meets these people in real life. According to him, he wishes they weren't gay etc, but won't inflict his personal views on them. He just doesn't want to spend much time with them.

But at the same time he's not a hypocrite, nor is he anything but polite. More polite than most people I know.

So you disapprove of his beliefs but currently rely on the fact that he's 'nothing but polite to people' to their faces.

Unfortunately, and this is from experience - his beliefs are not going to be kept inside forever. There's definitely going to be an instance in the future (if you guys hang out in groups) where he feels the need to say something. Like maybe you're hanging with friends and someone's applauding some LGBT progress or whatnot, talking about how they hate the North Carolina bathroom bill, dissing Trump, just whatever (because I'm assuming as a left wing person you are friends with other progressive people too).

And then he speaks up and says something bigoted. Or maybe it's very subtle, like "I don't agree with homosexuality but whatever". And that's his right to say something. But then you suddenly become that friend with the bigoted boyfriend that nobody likes or wants to be around.

Sorry but it happens. I have a friend who I love dearly but she's dating someone who is somewhat antisemitic. And it came out in a very subtle way over dinner with friends. The girlfriend was talking about a movie director and said she didn't like his movie because it "was so Jewish! All his movies are so Jewish ugh". The whole table was like... wait wtf? Why is a Jewish movie bad? It was so uncomfortable. And here I am - a Jew myself - sitting there like... is this girl serious. Point is, it's kind of heartbreaking to see your awesome accepting progressive friend dating someone like that (and later on, friend confirmed she is indeed somewhat antisemitic AND a little bit racist too. How she can date someone like that is beyond me...).

What do you think reddit? Does he sound like an okay guy, and are these differences too big to overcome. Should I pursue this relationship or end it before it gets too deep? Feel free to ask for more information if needed.

So to answer this question, no... to me he doesn't sound like an okay guy at all.