Religion is culture. If you doubt that, go to country X and ask them about god(s) then go to every other country and ask the same. Even if one of them got it right and is following the word of god, it would still mean every other country has got it wrong, and _theirs_ is just culture.
Now, if we bend for one cultural norm, why not another? I'd say it's not that his culture shouldn't be treated like religion, it should! It's just that religion shouldn't be treated specially in the first place.
Religion is culture. If you doubt that, go to country X and ask them about god(s) then go to every other country and ask the same. Even if one of them got it right and is following the word of god, it would still mean every other country has got it wrong, and _theirs_ is just culture.
Now, if we bend for one cultural norm, why not another? I'd say it's not that his culture shouldn't be treated like religion, it should! It's just that religion shouldn't be treated specially in the first place.