He wrote that he was a Christian.
your point?
He did?
"I have recently been examining all the known superstitions of the world, and do not find in our particular superstition [Christianity] one redeeming feature. They are all alike, founded upon fables and mythologies" (Letter to Dr. Woods).
"It is not to be understood that I am with him [Jesus] in all his doctrines. I am a Materialist." (Jefferson letter to John Adams)