I say this with the utmost concern for your well-being because I really want to help those ungrateful militant ME patients -- CBT is the only evidence-based treatment for false Santa-jumping beliefs. As we all know, Santa never hides behind christmas trees, so your rational fear of the irrational fear of Santa jumping out at you from behind a christmas tree is, in fact, irrational and therefore subject to CBT.
Now me, I have a very rational fear of BPS psychiatrists jumping out at me from behind christmas trees.