"It" can also be murder, or grand larceny, or armed robbery.
In some Muslim countries, it is absolutely considered proper for a male relative to kill a female relative if they have "dishonored" the family by committing fornication, for example. To us, that's a "jailable offense" because our "particular religious fantasy" proscribes it (and don't give us any guff about "human dignity." If humans determined this stuff ANYTHING would be legal. Religion is the single palliative to a host of human ills).
The question then becomes which religion is the true religion -- and that, for all the pain that goes along with it -- is still a far sight better than the alternative.
We already have reports of te final result of the alternative. Most recently: the lives and fate of the aboriginal inhabitants of Van Damien's Land.
Nonsense. Each of these things involves someone being hurt through force or fraud. Two people making a mutually beneficial exchange hurts no one. Next.