Since I really don't think it likely that your parent will listen to a bunch of strangers on the Internet, it doesn't really matter what I or anyone thinks here. When it comes to religious stuff, parents are usually very resistent to anyone who recommends that they not try to indoctrinate their children.
So I think you are stuck with the choice that's put before you. I wouldn't worry about it too much. If it were me, I'd cave in and watch the film. But if it's a situation in which you have to watch this stuff daily, you might try to bring a sympathetic family member to plead your case. One argument the family member could make is that too much of this stuff will tend to make any young person rebel and reject these ideas totally.
Just watch, either be uncomfortable or imagine it's something else with a different soundtrack. Keep your phone.
