And criminal tendency is just innate? Or is it also caused by socio-economic and historical factors? Just because you want to stop asking "why" at "criminal tendency", doesn't mean the rest of us aren't curious.
I have no idea if criminal tendency is innate. And frankly I think such a discussion has no place in K-12 education, even if it were just a plain fact that black people were somehow inherently predisposed to criminality. They're Americans, they're part of our mix.
But 12 year olds do not have the reasoning capacity to handle that issue. It's not "age-appropriate" for 12 year olds to be introduced to such topics in elementary school. Just like gender theory.