The options here are not binary. There are other possibilities than keeping them ruining the class or abandoning them.

A lot of countries have dedicated schools for those children, so they damage nothing around them and can be treated individually. And in lot of cases, since it requires removing them from families where their problems comes, it’s a breadth of fresh air for them.

As an outsider, it looks to me like the options in America are binary. Either the student can be removed from the class, or they can’t. The problem as I understand it, is that in regular schools teachers are disempowered from removing trouble-making students for a number of reasons, including “equity”.

I agree, that special programs and schools are required for challenging students. But that is a different question.