Without them, it is difficult for any relationship to survive; when fundamental matters like the existence of god(s) are involved, they become even more critical.
But the advice here applies to some of the most common beliefs I've encountered.
I wanted to be able to meet his family and get to know them. I applied to all the California dental schools, but some across the country.
I wanted us to become part of each other’s families. He is a stubborn, equally passionate, and resolute person. We bickered and fought (still do) but he never took cheap shots. I did not want to have to date long-distance so our first serious conversations about marriage went along with my application cycle. And speaking of sacraments, he was willing to baptize in the Catholic Church any children we were blessed with.
Instead, what we are talking about is a willingness not just to agree to disagree, but also to agree that the other person isn't evil or stupid for the position they have adopted but you have rejected.
Your partner might be mistaken and they might not be rational about it, but they should not be treated as if that mistake is for anything other than honest and fair reasons.