I think Jesus did exist but from a non-Christian point of view, I have always thought of him as a black African. Early Christianity seems to have started in North Africa and spread to Ethiopia long before Europe was converted. There seems to be plenty of evidence that the mothers of St. Augustine and St. Thomas of Aquinas were black.

Perhaps we are imposing on the religions (Jewish and Christian) a racial way of thinking that wasn't as prevalent in those days.

Jews and Christians alike were probably of many colours.

Jesus could easily have been black, white, or all the shades in between. As far as the white hair goes, maybe he was prematurely white. In any event, Christianity gained its momentum because it opposed Roman (white) rule. Of course Rome eventually assimilated the Christians by giving them central authority in Rome but thats another story.