You wrote:
“We’re all bad...However, only those Protestants that are ‘saved’ are in the Body of Christ’...Any heathen can be a Protestant, or Catholic...”
Actually no heathen is a Catholic. Once baptized, a man is a heathen no longer. If he falls from grace after that then he may act like a heathen, but that doesn’t make him one.
Mar 16:16 He that believeth and is baptized shall be saved; but he that believeth not shall be damned.
The scripture proves you wrong...If you're baptized without believing, you're still a heathen...