I have to agree with @Dis86 here.Because...as I've stated multiple times they view Muhammed as perfect and God as infallible and omnipotent. Therefore Muhammed wouldn't lie about what God told him and God wouldn't neglect to tell him something as fundamental as shagging kids ain't good.
In all these religions, a god gave his word/instruction manual to some people a couple thousand years ago (give or take).
Either the mind of this deity is constant, and unchanging, and thus his standards today are the same as his standards back then.
Or his instruction manual was only appropriate to the times those people were living in - in which case why do they follow it in 2020? Today's standards are vastly different, so if this deity is concerned with changing human ethics and social norms then what he said 2000 years ago is pretty irrelevant?
It's pretty much all or nothing. You either throw away those religious books and class them as a product of their times, or you think they apply just as much today as they did back then.
If they apply just as much today as they did back then, as most religious people believe, then you can't conclude that it was OK back then and not OK today.
Unless you're one of those people who says, "I'm an X" but doesn't really know the main tenets of your own faith
