I think you did the right thing. And sometimes life is just awkward.
Dovid Hamelech says he used to talk about the Torah when he would get together with other kings, and it was very awkward because the other kings wanted to talk about hunting and corn mazes and whatever else they played.
But Dovid says: ?????? ??????? ??? ????? ??? ????
I think you are correct that talking out your issues is unlikely to lead to your accepting his kashrus. If he is a reasonable person, he’ll understand (the same way I understand that people who keep yoshon don’t want to eat my challah), but, if he is a reasonable person he probably also won’t push the issue.