Santa causes suicide because when he is served to desperate people as the meaning of Christmas, the reason for peace, hope and love, it will not satisfy.  It will lead to despair.

Christmas is not for the happy and the comfortable. Christmas is not for the satisfied and self-righteous.  Christmas is not for the unafraid or the unencumbered. Christmas is for the dying and the dead, the broken down and the burdened, the mourner and the depressed. 

Christmas is for the shitty manger.

And some stupid fantasy about believing and Santa Claus and wishing you were a kid again will only lead to despair!  But the gifts of Christ which he won on the cross alone give peace, joy and hope.

Excerpt from “Santa Claus and Suicide” by Joel Hess