I think the doctrines taught here are more disconcerting than a massacre that happened 150 years ago. Most of those people would be dead now even if they hadn't been killed then. So I think it is somewhat irrelevant.
What do you think about Joseph Smith's concept of God? Is it scriptural?
A question for Mromons: Is this doctrine of a plurality of gods taught in the Book of Mormon? If so, where?