A spoof of Fairy Tales?
My analysis of the original tract
The original tract makes the presumption that to teach kids that Santa and the Easter Bunny is real, will result in them lumping Jesus into that same category. I never had this issue as a Christian child growing up and I see here a really extreme scenario which would never happen in reality. Harry obviously had some serious mental illness which needed to be dealt with, but never was. No normal kid would turn into a psycho simply because their parents lied to them about the Easter Bunny and Santa.
Just another fairy tale? Actually these days I think this world would be better off if we threw all religion under the category of fairy tales.