I had two Mormon types come to my door and I allowed them to finish their presentation. When they were done, one of them asked me if I had any questions about Mormonism. I said, "Yes, one question, why did Brigham Young order the massacre of 120 innocent pioneers on their way west at a place called Mountain Meadows"? They were horrified! They said, "What? I never heard of such a thing. Where did you get that story"? I assured them it was the truth, but they said, "We will find out about this and get back to you."
That was 9 years ago.I'm still waiting.