Fantastic article. Upvoted and resteemed. But, I'd like to give my 2 cents.
Bible is not one book by one author. It is multiple books by multiple authors.
Deuteronomy is the fifth book of Torah, a Hebrew bible, and the Old Testament, which is based on Hebrew bible.
Christianity is a religion based on teachings of Jesus Christ, whose story is told in the New Testament.
So, Deuteronomy is not supposed to apply to Christians. The only words Christians are supposed to follow are the words of Christ. Those nasty passages that you quoted are not told by Jesus, and those nice are.
Whenever I discuss religion with my atheist friends, who claim religion is bad, poisons everything blah blah, I asked them this question:"Is there anything wrong about the teachings of Christ?" They usual response is:"No, Jesus is fine, his followers are not."
RE: What Muslims Believe