Santa Claus, according to morons at the University of Minnesota, is a breach of the establishment clause.
Meanwhile, Satan Claus wold be perfectly acceptable.
Red and Green Colors ‘Not Appropriate’ During the Holiday Season, University Says
University of Minnesota officials recently distributed documents to employees and student-workers advising them to keep “inappropriate religious celebrations” out of public spaces.
The document, titled “Religious Diversity and the Holidays,” encouraged recipients “to recognize the holidays in ways that are respectful of the diversity of the University community.” It listed several specific examples of “religious iconography” the university says are inappropriate for display.
“In general, the following are not appropriate for gatherings and displays at this time of year since they typically represent specific religious iconography:
Santa Claus, Angels, Christmas trees, Star of Bethlehem, Dreidels, Nativity scene, Bows/wrapped gifts, Menorah, Bells, Doves, Red and Green or Blue and White/Silver decoration themes (red and green are representative of the Christian tradition as blue and white/silver are for Jewish Hanukkah that is also celebrated at this time of year).”