How sad! I always enjoyed Santa as a kid. I wonder why there's pressure to get rid of him and not, say, decorations of witches or goblins at Halloween time. There may very well be, but I've not heard of it.
Perhaps though the school district is afraid the displays could be upsetting to some of the students and alienate them. The police in San Bernardino seem to think it may have been one of the reasons behind the attacks there:
http://www.aol.com/article/news/2016/12/01/police-chief-christmas-festivities-may-have-sparked-san-bernard/2161852