I don’t think it’s fair to blame ‘public schools’ for this massacre.
The blame sits on the youth who in the end shot himself. He was I believe on anti depressant meds.
I do blame what I have seen in asian parents the heavy stress they put on their kids to excel, and the shame they bring on their families for failing to do so.
Could have been contributory to this situation. The kid couldn’t fit in, and make the grade, so he went nuts. The antidepressants can cause the suicidal tendencies that ended this terrible thing.