That would be to impose a personal inference.There is obviously a degree of disapproval and dislike in recommending that someone "convert" his/her sexual orientation.
A Xian could have a message of love....like curing cancer.
Religious discrimination could be an issue in a more fundy section of the country.I doubt a civil rights commission or judge would consider refusal to put a message on such a cake to be discrimination on the basis of . . . . what? On what basis would the baker be discriminating?
I'm just speculating about what could happen.
Whooda thunk Menards would be sued over the names of lumber?