I do understand where people are coming from when they say "it's their house, their rules", but I think these things should only be true for, you know, curfew, who you can have over/when, etc. Things like that, ABSOLUTELY NOT with regards to one's beliefs (and trying to force your own upon your child).
I think it is absolute bollocks, and it will only breed resentment (like the OP has stated) for both the parents and the subject that is being forced upon them and nothing good can come out of that.