Sure but what does it matter that Saint Nicholas existed in turkey if the santa that children "worship" lives at the north poles with elves and magic reindeer? that a fictional story might draw inspiration from a historical fact but it doesnt mean anything more than leonardo divinci being in assassins creed.
historical jesus didnt exist because whatever person with a similar name that you pluck from history will not have been the son of god and all the supernatural implications that brings. santa didn't exist and neither did jesus.