I need to clarify what you mean in reply to Bob's comment that false doctrine within a Christian denomination is not the same as non-Christian religion. You replied that "they are not Christian no matter what they may claim to be." Are you saying that a member of the CoC, Catholic Church,.....maybe SBC, Methodist, Presbyterian, SDA, Free-Will Baptist, Reformed Baptist, etc. (depending on what you view as a "false doctrine" are not Christians no matter their claim (no matter if they hold to the gospel of Jesus Christ) because they also hold to error?