From what this article says, it sounds like the only way to ensure that the trend doesn't continue, is for us to scream loud long about any 'trampling' we see. Everyone has to participate. Write, phone, email and complain.
In Kennisington, it only took 2 families complaining to get Santa excluded. It will take 200 families complaining to have Santa included, or have a Christmas Tree, or Christian Faith symbol in a public place.
Unfortunately, that's the way it is. Let's do it.