CB: I don't believe mainstream Christianity fits into this:

"However, there are occasionally some Christian groups that qualify as well. Do we label all Christians members of a cult?"

But When you get to fringe groups like the Branch Davidians(of Waco notoriety) and Jim Jones's cult that met their sad end in Guyana they at least in my opinion fit the bill.
Jim

The 2nd Amendment IS an unalienable right.