Priest who tells kids that Santa Claus doesn't exist... What do you think about that?

My cousin posted this story on her Facebook today. Her friend’s daughter came home in tears yesterday because a priest who had visited her (Catholic) school told the class that there is no Santa Claus. Apparently he was upset about the commercialization of Christmas and the lack of “Christ” in Christmas.

Regardless of how you feel personally about Christmas/religion/antelopes/whatever, do you think it was right for him to do that? How would you react if that happened to one of your kids?