> Is that supposed to be bad?
Quite possibly. One of the big successes of the law and modern political traditions like liberalism has been demonstrating that the most successful path is when "we" don't respond and provide mechanisms to let individuals sort out their own differences in a 1:1 fashion, personally navigating the power dynamics.
Strong group responses are actually quite destructive and squelch non-conformance. Anyone who might be unusually successful with an unorthodox strategy gets crushed. Ends really badly for minorities too. Groups aren't any fairer, nicer or more empathetic than an individual and in fact (because they tend to lowest common denominators and plausible social deniability for inaction) are often much more violent and cruel.
We don't want the teachers taking an extremely successful and tolerant society focused on individual action in context of a group and then inculcating group reactions in context of an individual. That will reduce tolerance and promote hate. Although to be honest teachers shouldn't be making any decisions about the culture, or children's personality, as it isn't really their role in life.