It appears to me that your understanding of the demographic involved is superficial at best.
All but two doors to the school (1200 students) were chained and locked shut. Illegal as Hell.
Judge ye not a person by the color of his skin, rather judge him on how stupid he wants to be.
That goes for children as well as giant babies with fully grown physical bodies.
Martin Luther King Jr was a smart guy. Too bad all the (b)lacks hate him and want their children to die in poverty and servitude.
Education ain't a right, pal. It's a privilege, and if parents are so stupid they don't want to discipline their own children to respect others, and thus remain where he can access the privilege of public education, then there's no reason for their spawn to remain in school where they will persist in disrupting other children attempting to exercise their privileged opportunity to learn.
And if the parent refuses to discipline their spawn, that's the end of that, unless the spawn has committed a crime that can be prosecuted as such by the proper authorities. None of whom are ignorant fat idiot school principals. The job of the school principal is to make sure the children wishing to exercise their privilege to learn is respected and not interfered with. Thus the principal has the authority, now never exercised, to expel dis-interested interfering students and turn the child over to the parent, who then has to babysit the child.
The schools are not supposed to be baby sitters.
The schools are not supposed to be indoctrination centers.
The school principal is not a Commandant, able to exercise violence upon his charges at whim.
The child in this case should have been sent home under the care of the parent-beasty with instructions that the suspension could easily turn into a permanent expulsion if the child is not properly regulated at home. Then the parent, assuming it isn't a welfare parasite, has to stay home from work or whatever, none of which is the school's problem.
But, in general, if a spawn does not want to learn at school, learn it shall. It shall learn to regret that it didn't get an education then, and now it's picking strawberries or spending it's life in prison.
Their body, their choice.
Aside from the FBI arresting a student for his 'work' with H Rap Brown, Stokeley Carmichael, and Eldridge Cleaver, and a couple of local PD arrests (well, done by State Troopers patrolling the halls of the High School with K-9s), removing half the student body would have spread the 'problem' we were having in school to the community at large and generated a real issue that would have spread farther and faster amid claims of racism. What you see now is just the redux of then, with another 50 years of preparatory bombardment by the Marxists and Race-baiters.
Think of it as societal evolution.
Think "LaMarck".
So we waste a large percentage of this crop of spawn. Some will end up in prison, some will end up in the morgue, some will end up in the gutter, some will get menial jobs and attempt to get the education their earlier stupidity denied them. They will all be the examples for the next crop of spawn. The next crop of spawn will learn better and fewer of them will become "problem children".
Same thing works for drug abuse. Make all drugs all legal, with no criminal penalties for use and possession, but require the sale thereof to come with a business license and the requirement to not sell to underage buyers. Crack down on underage sales with death and dismemberment. Enough morons will waste their useless lives to serve as a lesson to the next generation of spawn to reduce the problem to treatable levels. Sales taxes collected on drug sales can go to this. Or not. Who really cares if an addict lives, anyway?
This is all about the cost we have to pay today because our parents were useless interfering phoques (that's a "seal" in French...pronounced somewhat differently than it's spelling indicates...) who wanted to mind everyone's business but didn't realize it wasn't their business to do so.
The world needs more real libertarians.
In the proximity to Washington D.C. ~25 miles), this would have been very messy, very quick. Besides, the school board was in denial over the whole thing, because the schools had been 'integrated' just a few years before and the other High Schools in the county were not having similar problems (mainly because school district gerrymandering ensured the children of TPTB were going to schools elsewhere in the county with a different demographic distribution, and admitting a problem in just one school would have exposed the self-interests, corruption, and possible racism of members of the school board).
Laissez Faire, Laissez Faire.
I don't care if the animals run riot in DC. It's not a state, is it?
Remember, the United States has never had to import uneducated people to do the menial work. We have plenty of people available to do the work, once we end the unconstitutional abomination known as "welfare". Work or starve. Their body, their choice.