Let's just cut to the chase. Thomas Paine in "Age Of Reason", which you can read online sorted this all out very nicely: the entire body of our religious works is hearsay.
New Testament, old, whatever. We've got little more than, "somebody says god says...", which isn't jack shit in a court of law, where the big kids actually make the rules.
No wonder it's embarrassing! Really, the most common ugly social issue arguments boil down to "somebody says god says...." and that somebody can be from the Bible, or Pastor Corn Hole Bob, who has it on good authority, or some other garbage.
All of it carries exactly the authority you grant it, and for all of us, it's entirely optional too, meaning none of us really have to care what "somebody says God says."
It's like trying to split the baby. Dig too deep into the problem and it gets really messy. Better to just move on and treat other people the same way you would like to be treated.
Racism, bigotry and theocracy are always wrong. Doesn't matter who says God says whatever. It's just wrong.
There, now we all can get along, New Testament or old, whatever.
And yes, God told me. Really.