I've known a few, and liked all of them. But many of their beliefs are crazy-out-there. Pure Bunk. They still believe that the American Indians are descendents of the Israelites who fled Jerusalem at its destruction, got on boats, travelled across the oceans, landed on the American continent somewhere (differing opinions on where that landing occurred). Totally made up.
Edited to add: I might have some of the details wrong, but I don't have the patience to look it up.