Ignore them. If they hound you, answer “Yes, I work there. It’s a nice school.” Then don’t answer any more questions about it.
There have been a number of cases in the US where liberal bullies attempted to undermine and shut down these schools.
A homosexual shows up with their kid to register, typically a cute kindergartner. The family tries to enroll the child. If declined, they sue for discrimination. If admitted, they use the kid’s supposed hurt feelings to sue to try to force the school to change its teachings.