Maybe Christmas the Grinch thought doesn't come from a store.
There are a lot of Grinches out there that would like nothing better than to take any references to religion out of the holiday season.
In fact men will fight for a superstition quite as quickly as for a living truth - often more so since a superstition is so intangible you cannot get at it to refute it but truth is a point of view and so is changeable.