Luther on polygamy:
“A man is not
absolutely forbidden to have more than one wife ; I could
not prevent it, but certainly I should not counsel it... Yet I would not raise the
question but only say, that, should it come before the
sheriff, it would be right to answer that we do not reject the
example of the Patriarchs, as though they were not right in
doing what they did, as the Manicheans say.”
Give it a rest. The Lutheran church does not embrace polygamy; and even your quote from Luther does not embrace polygamy. He merely refused to get excited about it and refusd to judge yesterday's actions by today's standards; so read it again and note that he is analyzing the issue, not endorsing it.