You could always just tell them to their face that you think them saying that makes you think they are racist, unfaithful, indoctrinated in misinformation, etc.or otherwise call out the behavior/comments as unacceptable in the workplace. Won’t necessarily make them reconsider their flawed ideals but can hopefully let them know that you don’t want to hear about it. I work remote now and that definetly cuts down on small talk in general. At a previous job some guy was deep in Christianity and was talking to me about how evolution just doesn’t make sense and God must be real because of it. I just brushed off and ignored comments like that because it wasn’t worth the hassle.