The resistance to the distinction between the two questions about Santa Claus -- the question of Santa Claus's existence and the question of Santa Claus's nature -- a distinction which I have properly brought to the attention of skeptics and militant atheists in this thread -- is perfectly understandable.
This distinction spoils all the fun for Santa skeptics and militant ASantists. It shows their malicious attack on religion to be futile from the start.
The question whether Santa Claus exists or not is not reached by the skeptical or ASantist attack on the North Pole.
Christmas Carols are stories about the nature of Santa Claus. There are a thousand Christmas Carols and stories about the nature of Santa Claus. Debunk any or all of them, and the question of Santa's existence remains untouched.
The skeptic and militant ASantist are baffled by this distinction. Or rather, their malicious attack on the North Pole is baffled. So they resist understanding it. They sing and dance in the dim flickering light of their mean-spirited nescience.