Nothing screams DICTATORSHIP louder than using "mental illness" as an excuse to lock up, or enslave, or even mass-exterminate your political opposition. Hitler did it, and got away with it while he was still vulnerable to removal in the early to mid-30's. He built vast "hospitals" for the "insane", and his Gauleiters dutifully "registered" tens of thousands of "sick" people, who were led into the new asylums as soon as they were built. There, these victims were given massive doses of psychoactive drugs (which the German labs invented, and rapidly produced) and maintained just above vegetative states on those drugs.
Who were these victims? They were people we now consider "disabled". They were children with Downs Syndrome, severe autism, congenital birth defects (extra toes and fingers, club feet, etc). They were the old and infirm. There were a few political dissidents, but not many. Hitler's program was more about cleansing the gene pool, and it went along with forced sterilization, which he also invented. Hitler wasn't a dummy, he was simply a power-mad individual who wanted to impose a new and different style of government on those he led.
When the War started, maintaining those patients became a burden on the Third Reich, so they simply started to kill them all. Tens of thousands were given lethal injections.
Hitler wasn't the only one.
Stalin took the idea and fleshed it out into reality also, but his main stooge, secret police chairman Beria went a step farther than Hitler: he used "mental illness" as an excuse to terminate all the rights of millions of people, MOSTLY political dissidents. These people were gathered up and sent to, not expensive mental hospitals as Hitler had done, but ordinary slave labor camps out in the Siberian hinterland, where they died far more often than they survived. Read The Gulag Archipelago by Alexsandr Solzhenitsyn.
What's been the history of mental illness treatment and handling here in the USA?
In a word: spotty. In this nation, based as it is (or, more accurately, WAS) on individual rights, there are strong legal protections against snatching people up and declaring them mentally unfit to belong in free society. In fact, and I've pointed it out in these posts several times, it is probably the #1 policing problem we face: responding to the dissonance caused in our harmonious lives by crazy people. It's difficult to lock crazy people away for treatment, though. The Courts see to that, perhaps mindful of the historical impact on the issue made by Hitler, Stalin and lots of other dictators too numerous to mention, but Chairman Mao was fond of that trick as well.
So, here in the USA, if we give any mental health treatment at all, we usually just start the patients on medications, mild enough so that they can still care for themselves, and turn them loose on society. Of course, most of these folks don't actually TAKE the meds they're given, so they're still crazy and still a bother to the police, their families, etc.
Now, we have to jump a political fence.
Oof! The old geezer lands heavily after his jump and looks around. In his new location, he sees some folks reeling emotionally from a recent severe mass killing by a presumably-deranged shooter. He sees that political action to take advantage of the nation's shock has basically failed. In fact there is negative reaction to the government. He sees a determined leader of the controlling political party wanting to STILL find some more ways to enlarge his government's authority over people who might be dissident to his "progress".
What does the old geezer find on the other side of that political fence?
He finds this. Yep, after the lessons of Hitler, Stalin and Mao (socialists all, BTW), he finds evidence that thinkers on the Left are starting to consider the path of those legendary dictators.
The geezer doesn't have a lot of years left, and he knows that he may not live to see "mental health" laws trump our Civil Rights, but he also knows how the collective mind of the power-mad politicos works, and once they seize on this idea, and apply their infamous incremental planning and implementation to it, an American Gulag WILL be brought into being.
The geezer hangs his head and begins to cry, wondering if THIS is why he brought children into the world? So that their sharp thinking and Question ALL, All the Time analysis he taught them could land them in the Gulag?
The sadness turns to resolve. The geezer vaults back over the political fence, easily this time, and there is a spring in his step as he clearly sees his duty. He knows now that he shortchanged his children by stopping when he had taught them how to Check the First premise, First, and ALWAYS look for the political motive in the actions of the government which affect them.
The geezer know that he now has to complete their education. He has to teach them to RESIST.