I certainly think the school could have made an amicable accommodation had they been asked (like send the kids to the library while the music class was going on with the Christmas carols), but these yokels look like they never asked, they just let it come at them like a freight train without budging then complain when they get squished. What did they expect in redneck gentile America, the Hatikvah? I am a Christian by conviction and I don't believe in Christians forcing anybody against their will in proclaiming the gospel whether it be by Christmas carols or anything else. Only God Himself can force that issue on somebody through conviction of soul. But these people had reasonable choices they didn't take.
The pageant was not even held during school hours. It was a special activity which was entirely voluntary. They could have opted out with no problem at all but Mommy Dearest wanted her little darlings to be in the glee club.
That school district does not do Christian music in schools! The event was an entirely voluntary PTO (Parent Teacher Organization) event, as was the choir that sang a it. Neither Judy nor her kids were required to be there, or even got 'extra credit' for being there. The PTO added their own event in response to the official secularization of the school. I'm from the school district she's referring to.