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?
Or you could get really orthodox and limit it to the Catholics. Where might you draw the line?
Or, you might do something novel and draw the line at the scriptures...
The Body of Christ is Spiritual, not physical...Conversion is in the spirit, not the flesh...
There is no physical Body of Christ; no religion that is the Body of Christ...
There are likely Christians in each of the groups you mention...And not everyone who is a member of your physical orthodox (to some) religions are going to heaven...