I would advise you to go ahead and read that BOM. Then put it in a plastic bag hanging on your doorknob. Attach to the plastic bag a letter addressed to “Mormon Missionaries” Say something to the effect that
“I read your book, and it was boring and poorly written. I found it offensive, racist, and blasphemous. I refuse to have any more discussions with you. If you persist, even today, I will call the police and file a charge of harrassment.”
put a little note at the bottom
cc: ___________ City Police Dept
And make sure you have followed through on that.
You should have no further problems.