I had an LDS temple worker landlord who everyone thought was nice...she tried to kill me.
I find a certain amount of strange behavior is common, though not expected. One of my Mormon friends said that strange people frequently come to “try out” the church. They are drawn to what they have heard, whether real or imagined.
We are really close with our Mormon neighbor. She and her husband were separated for two years before we were told. We knew, of course, but it’s never been discussed,