I feel like what he’s doing is a very basic thing of what not to do in a relationship.  You’ve told him that you don’t like the comments, and no matter what his opinions may be on why you don’t like the comments, it’s a reasonable thing to ask of him to keep them to himself and he should respect that.

The way I’d go at it is to dump him, honestly, but it’s up to you to decide whether or not this is a deal breaker, especially since he’s expressed that he has no plans of changing it and expects you to just deal with it. How you choose to deal with it is now up to you.