The way I see it is, I'm not going to have known the person long enough to have to ruin a friendship over. I.e. It's not going to be a year into knowing the person that they've suddenly decided my use of "God" in my language is inappropriate, it'll have come up far sooner. And I probably wouldn't be friends with some one that had that sort of view on the matter. If it was a work colleague, certainly where I work, I think the person will be sort of casting themselves out of the group - But it's different in different work spaces. I work in a small company where it would be more brushed off. I could see it potentially being a problem if someone brought it up in a bigger company that had a HR department etc. 
