@GaP42 - your hypotheticals are getting a bit far afield.
Should children at primary school be or not be reprimanded for racist statements? The first question before that is to determine if the child even understands what statement was made and whether that child was parroting a parent.
When I was a kid, my father was moderately racist. My mother taught me to not use the language Dad used and she eventually calmed him down. He was a good guy in many ways and actually a loving man, but he was himself a product of a very difficult childhood and didn't have a strong father figure to discipline him. (It's too long a story to relate here.) I didn't understand that the words Dad used during my early years were, in fact, offensive. Mom corrected me and informed me that the words were hurtful. She simply told me that good boys don't use hurtful words and at that age, the lesson stuck. I don't remember any conversation she might have had with Dad when HE got home because I think they held that little discussion when I was outside playing.
When you jump to questions of physical assault, most schools here have a formal procedure to deal with violent children. As to racist incidents, a lot more of the incidents are concerned with bullying, and any racism angle might just be a sprinkle on the ice-cream cone. To be honest, I have no clue how to read the statistics coming out of schools these days. Oh, I understand statistics pretty well. Had to study them for my doctorate in chemistry. But Mark Twain once said this: "There are lies, damned lies, and statistics." If put forward by a politician, the difference between statistics and damned lies become minuscule.
Madness, maybe in your view but you have no real information about any specific incident.
Nor does it matter whether I do or don't. We have 50 states with 50 different sets of state laws governing school districts. Forgive me if I'm not up on state school discipline laws. But I know they exist.
You seem to have a massive chip on your shoulder. I'm truly sorry that you are carrying that burden. I don't believe in the mysticism of the Bible but I absolutely DO believe that it offers good advice. Like forgiving people by recognizing that often, they are not malicious but instead are simply ignorant. They know not what they do. That should take at least some of the sting out of what nettles you.