I have zero problem with it, and I see it as a positive. Contrary to most Christians' beliefs, I'm sure, I see it as beneficial to Christianity for the holiday to remain as culturally relevant as possible.
I think it's all fine as long as people aren't worshipping Santa. It does provide a good insurance policy against Christmas ever falling into obscurity, which probably makes it easier to evangelize in the long run.
And I don't think that is happening at all, really. "Religious Americans" (in quotes because it's a subjective label) will obviously continue to see the holiday as both cultural AND religious in nature, so the worst that can happen from my perspective is that a few people who are on the fence - likely younger and brought up in a more secular culture but still with some ancestral fondness for religion, like my 25-year old sister - end up in a church on Christmas Eve for "cultural reasons" and forge a reconnection.
