It says it was the musical program, not a *Christmas party*.
The way it works is the kids take music at school and present a program to the parents.
That's it. If it is given during this time of year they do songs related to it.
At my daughter's school they split the younger grades up so some perform now and others in March. The older kids will be giving two concerts (we will attend this Thursday, and naturally I already know every song that will be played---band this year, not "just" singing).
Article title: "School's inclusive Christmas excludes Christ"
From the article: "When children who attend the McHenry County school gathered in the gym last week to brighten friends and parents with holiday cheer, they sang of lighting candles for Hanukkah, gave their rendition of a Jamaican folk song and even did their lists for Santa."
My point stands.
Dan