Supernatural isn't real. Sam and Dean Winchester aren't real. That means the Carrigans, the Santa and Mrs. Claus-esque Pagan gods, from A Very Supernatural Christmas can't be real.
So, how can my parents trot out their terrifying idols every December to decorate my childhood home?
LOOK AT THEIR EYES TO UNCOVER THE TRUTH!
Those empty black sockets can only be the result of ritual human sacrifices and too many cups of cocoa.