But I did go there, and it isn't at all beneath me or you to compare the credibility of Christmas and holy spirits.
I stand by my point--the arguments against the existence of Santa Claus are precisely the same type of arguments that an atheist would mount against the existence of God.
Well, now, let's be fair. We don't all have the same definition of Santa Claus. Should you bother to visit the North Pole (and I advise you to take swim suit on some summer days), you will not find Santa Claus. Why? Because of what you just said--he's a MAGICAL being. I don't think of him as human, although I admit to some resemblances. God shaped us in Santa's image, you know.
Anyway, Santa is fully capable of rendering himself invisible and undetectable, just as God is. So merely going there and not finding him doesn't mean that he isn't there. It could just mean that his magic works.
And you can see that I am supporting maintenance of a belief in Santa that is the SAME type of argument to support maintenance of belief in God. The argument is incredibly flimsy, but not to people who have formed a prejudgment that Santa really exists and want to maintain that belief.
I believe that you are wrong about the absence of evidence not being evidence of absence. When a belief causes you to expect certain things, and your expectations turn out to be false, that tends to be seen as evidence that the belief is false. Scientists use this kind of reasoning all the time to prefer one possible explanation of a phenomenon over another.