So what, though? Aren't these discussions supposed to address the veracity of said belief? How does identifying the origin of my belief prove anything as regard to the belief itself?
It doesn't matter if I saw Jesus in a dream as a life-long atheist, or if my mom beat me over the head with a bible....criticizing how I got my religion is the same as criticizing where Bill Gates got his business expertise from.
It's a pointless discussion to have.
It is a pointless discussion to have. But it's no more pointless than stating your belief in a deity, or a deities' son vs. any other myth- or legend-based being. They both miss the point entirely.
Using Santa Claus as an example: the myth/legend of Santa Claus was built around a historical person, indeed a Saint of the church. The modern image and idea of Santa Claus is an amalgamation of cultural icons, most (all) of which celebrate the idea of giving to the poor or the less fortunate.
To believe in the physical being of Santa, Jesus, Mohammed, etc. is infinitely less important than living and acting in the ways they lived and espousing their ideals.
The Golden Rule, "Do unto others as you would have them do unto you" was espoused by Jesus but existed long before he is rumored to have lived; but that doesn't change the fact that it's a damned good code to follow.
Giving to the poor or less fortunate as Santa Claus would is also a damned good code to live by.
You and other Christians, as well as Muslims, Jews, etc., do yourselves and others a great disservice by constantly trying convert non-believers with the verbal bullying. You would convert many more by exemplifying the ideals of Jesus.