Please stick with Christians.
It would be interesting to try to figure out who are really Christians and who aren't. For example, are the LDS any less Christian than Oneness Pentecostals? How about Christian Science? What about John Hagee? The Children of God? Jim Jones' People's Temple? David Koresh's Branch Davidians?
Or you could get really orthodox and limit it to the Catholics. Where might you draw the line?