From THE BBC:
The traditional school nativity play is under pressure to modernise the story and remove religious figures, according to users of a parenting website. Parents on Netmums have given examples of characters such as spacemen, Elvis Presley and footballers being introduced to the nativity story. There are also claims Christmas plays are being called "winter celebrations".
Netmums co-founder Siobhan Freegard said parents were concerned Christmas traditions were being "pushed aside" and that many of the parents wanted schools to keep a traditional version of the nativity play.
"This study shows many parents who aren't religious look to the nativity as a comforting part of the Christmas celebrations and want their school to embrace and celebrate it, rather than make up a version with perhaps less resonance for kids," says Ms Freegard. "It seems wrong to bombard kids with commercial messages about presents and Santa without them realising the true meaning of the celebration."
Putting on a nativity play that replaces the traditional story with a secularised, consumerist alternative is no different to teaching creationism instead of evolutionary theory. Schools would not bastardise Shakespeare even though there is plenty in the Bard's work that is non-PC today. To do so would be to remove it's educational value as well as its integrity. If teachers cannot teach children that different stories contain different types of factuality and demand different types of reader response then they shouldn't be teachers in the first place.