Well they do all come together as a community, which is the part I love about the special, and then Linus reads the bible for Chuck to remind him what Christmas is all about. It's a lovely little story, but it is explicitly Christian.

I feel like they lampshade it a little in the following year's It's The Great Pumpkin, Charlie Brown. In that one, Linus is the only kid who believes in the mythical Halloween spirit the Great Pumpkin.