OK, so different cultures have different traditions, and so they consider different practices as morally acceptable or unacceptable. Fine.
But we're all human beings, regardless of the culture we live in. You don't consider slavery to be wrong. Is it only not-wrong in the US, or are there other cultures in which slavery is also not wrong in your view?
I believe that I have sufficiently explained myself. You will not be satisfied until you can say, "ah ha" you said.." So forget it. You are not luring me into your liberal trap. By the way, answer my question. Is slavery a moral issue? If you say it is where do you derive what is moral and what isn't?