“but just try to be calm about it”
“do not get into an Israeli style argument.”
Ah, you’ve met people from my country.
I have to admit, my absolute first desired response was breathtakingly illegal.
But as an adult, we know that that is the wrong thing to do.
Thankfully, the other kids are a good bunch and went after this boy! But that's not enough; the Nazi-boy's parents need to know what he has been up to! He is their progeny and they need to handle this situation before it gets out of hand...which it can do, if not nipped in the bud.
I hope that your beloved daughter is handling this as well as someone that young can "handle" this kind of garbage.