Oh I get that, people digging into their 2000 year old book and saying this and that hurts their feelings.
Well, guess what? I don’t think making laws based on peoples hurt feelings is a good idea. Follow that reasoning and you will ban people drawing Mohamed. An asshole thing to do, but you can’t make laws because peoples feelings get hurt.
There are always caveats in any law, say for marriage. So long as it is between 2 adults, of consenting age, are not related. But KISS (Keep It Simple Stupid). If a society has decided (quite rightly IMO) there should be no discrimination towards gay people, then there is no grounds for discriminating against same sex marriage. To further that argument for the sake of @finley and artificial insemination. If a society has decided that a national health care system should extend that right to infertile couples, they should absolutely extend that right to say a 2 women couple.