1. The teacher's own statements here make it quite clear that this is not a matter of a brave woman standing up for her beliefs. Instead, it's just some delusional person who sees a "religion" where one doesn't exist, and decided that "Since I can't teach my religion to those kids, then I'm sure as hell going to screw up theirs!". In short, she's a sanctimonious hypocrite who took out her own psychological issues on a bunch of innocent kids.
2. Regardless of any other issues raised by this incident, there's only one that truly matters at the end of the day: This person has pr oven herself wholly unsuitable to hold the position of schoolteacher. Anyone who would do this to a class full of six-year-olds either was too stupid to realize that this sort of outcome was preordained, or was fully cognizant of that fact and proceeded to do it anyway out of spite. That's not the sort of personality type that ought to be in charge of any group of kids under the age of 12 or 13.
Just because you have no understanding of that religion does not mean it doesn't exist.