TLIK, you totally misread Haimy’s post, then did the same thing he did in reverse.
Neither of you exonerated anybody. He’s bemoaning what he perceived as the kids being totally exonerated, but explicitly not letting the teachers off the hook.
You just flipped it that he’s letting everyone but the kids off the hook (which he clearly didn’t), and bemoaning that.
You both agree that everyone is to blame.