Bible?

I do not live in the US, I suppose I am mildly homophobic, and I can't get my head around same sex marriage. OK fine, but it seems to me that one is pulling a long bow by saying the 'Ten Commandments' forbids homosexuality. The other point, is the law of the land biblical or secular? If one is convinced that the US has based its laws on the 'Good Book', then adulteress' should be stoned, unruly children can be executed,(I read that somewhere). I was under the impression that Jesus replaced 'The Law', with divine love, "Let he who is without sin cast the first stone...", this does not seem to have come into play among the self righteous. 
 
Mike

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