I Believe in Father Christmas
From Conservapedia
I Believe in Father Christmas is a 1974 single by Greg Lake. It has been hijacked by atheists who pretend it is antireligious, when it is in fact a protest against the secularisation and commercialisation of Christmas; Lake in fact said in an interview:"I find it appalling when people say it's politically incorrect to talk about Christmas, you've got to talk about 'The Holiday Season.' Christmas was a time of family warmth and love. There was a feeling of forgiveness, acceptance. And I do believe in Father Christmas."
The video for the song contains shots of the Vietnam war, leading to complaints that this was distasteful.