Hi, Archer. I'm glad you started this thread for many reasons; the listing and explication of them is probably irrelevant.
Hypocritically judgmental Christians, as pious and smug as they were grasping and mean-spirited, led me to a precocious atheism by the age of 10: nowhere else could I see a gulf so wide between professed belief and conduct, except, perhaps, among southern politicians, who were just an acute subset.
Yet I have met extraordinary people who were Christians; I've met extraordinary people who were not Christians, yet who lived Jesus' creed more sincerely than the vast majority of professed Christians.
The doctrinal/historical inconsistencies of conservative, evangelical Christians are apparent; Catholic Scientist et alia are doing a fine job of exploring those in this thread (I really like CS until he pisses me off
).
So I'd say this:
A true Christian is someone who sincerely tries to live by the precepts of Jesus of Nazareth, knowingly or not.
I don't think he was any more divine than you or me, but he was certainly a moral and ethical genius.
How do you spot these true Christians? I'd offer one first-order Electric Kool-Aid Christian Test:
They don't throw stones.
"If you can keep your head while those around you are losing theirs, you can collect a lot of heads."