Some school districts in Japan already do this to kids tbh. There was a kerfuffle a while back and some schools dropped some limitations after lawsuits. Like if your kid has naturally curly or blonde hair you’d need to prove it. (Haven’t gone deep on fact checking, take it with a grain of salt)

I’d say it’s not unreasonable that if you have a manufactured preconceived (racist) notion about a place that you would believe it.