This is fairly common in foreign language classes, French, German and it teaches about the culture of the country.
Not a big deal and Perry should not bother to comment.
Teaching about the culture is one thing. Repeating a pledge or oath or worse engaging in a cult practice is quite another. This is nothing short of indoctrination.
“Not a big deal and Perry should not bother to comment.”
Listening to a national anthem, or maybe singing it through once, for info is not a big deal. However, pledging allegiance to another country’s flag is a huge deal. Perry needs to comment, and loudly.