Yeah this is called context. We've known for decades the same approach doesn't work with everyone.

Also, that's a shit situation you describe, but EVERY kid needs love and kindness. It's not unique. At the point where one student's behaviour repeatedly detracts from the class/school's safety (rare in general, but there's often one-a-school) you sometimes have to mitigate that one kid's presence temporarily for the good of the rest. It's not complex, it's just reality. Removing that ability helps no one...boundaries help kids.

Teachers aren't paid to infinitely take abuse and you can't expect the quality of education to be high when that's the case.

Yeah, teachers are the stand-in guardian (at least at an elementary level) for 6 hours a day so that would make sense. There's always a couple parents every year that zoom in to the school whenever a kid loses a recess though...

Knocked it outta the park.

From elementary on up, schools across much of the US/Canada have never had less power to enforce any discipline. 'Discipline' is a no-no word itself. In trying to correct past over-suspensions (a legit issue), very little exists now at any level to correct shit behaviour. And it carries on up the line to highschool.