From CNN: Polygamist sect leader Warren Steen Jeffs was found guilty Tuesday of being an accomplice to rape for using his religious authority to push a 14-year-old girl into a marriage she did not want.
Compare: Jacob married two women, plus two baby mamas. Abraham basically had two wives, Sarah (the good one) & Hagar (the bad one). This passage from Deuteronomy deals with the sticky situation of loving the child of one wife more than the other.
So, am I cherry picking to reject polygamy--clearly accepted by the Bible, there's lots more I wasn't even through the first five books--and accepting homosexuality--again, I think you'll trust me when I say there is plenty of condemnation there?
I think not. Polygamy, like slavery, like homosexuality in the time the Bible was written was a different phenomena than the modern practice bearing the same name. Polygamy exercised by Jeffs and his followers, who are not Mormon BTW, is evil. Some of that is related to the modern values--equality of women, marriage for love--and some of it is related to modern conditions--living long enough to be 30 when you have a family, fewer men killed by bears. But, polygamy is different than it was in the Bible.
If you are a literalist, you may be stuck accepting polygamy. You'd think that would be enough to convert anyone away from literalism.