I'd recommend reading the history of the Frankfurt School. Frankly this stuff sounds like a conspiracy theory when you don't hear it from the horses mouth.

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In short: 'Critical Theory' is taking society's healthy willingness for self-reflection and improvement, and hijacking that immune system into an auto-immune disease. Repeatedly criticize every facet of society. Make society responsible for every current and past wrong. Never demand a solution, just criticize. Criticize until a secular sense of original sin - that we are born guilty and dirty and oppressive - is worked into the mindset of the culture itself.

Keep it up for a few decades. Once you work this reflexive guilt and self-derision of the culture into the culture, people will naturally push it on it's own. It's like a cancer. The result is Political Correctness, and at the extreme end, the SJW crowd. Nobody dictates what is politically correct or not. It's not a grand conspiracy with evil people in the shadows. It's just an insidious attitude of thought that propagates itself once started. Because there's always a moral high-ground, and status to be gained, from being oh so smart enough to criticize one's own society.

The end goal being to have the culture undermine it's own validity - attack its root morality from all sides until the culture implodes on itself. Paving the way for a communist revolution yadda yadda yadda stupid communist ideas yadda yadda yadda.
Whether it accomplishes their goal or not is irrelevant , the devastating effects of turning a culture in on itself are real enough. Even though I personally hate Trump - it's pretty obvious why headlines like the one from this thread bump up his popularity. He's promising to be the Radiation; the Chemotherapy. The horrible pill we hold our nose with and take, in the hopes that it kills the malignant mutated part of the culture without killing the whole damn society.

If you want a career pursuing any form of value other than monetary value—if you want to work in journalism, and pursue truth, or in the arts, and pursue beauty, or in some charity or international NGO or the UN, and pursue social justice—well, even assuming you can acquire the requisite degrees, for the first few years they won’t even pay you. So you’re supposed to live in New York or some other expensive city on no money for a few years after graduation. Who else can do that except children of the elite? So if you’re a fork-lift operator or even a florist, you know your kid is unlikely to ever become a CEO, but you also know there’s no way in a million years they’ll ever become drama critic for the New Yorker or an international human rights lawyer. The only way they could get paid a decent salary to do something noble, something that’s not just for the money, is to join the army. So saying “support the troops” is a way of saying “fuck you” to the cultural elite who think you’re a bunch of knuckle-dragging cavemen, but who also make sure your kid would never be able to join their club of rich do-gooders [...]

I don’t think we can solve the problem by mass individual defection. Or some kind of spiritual awakening. That’s what a lot of people tried in the ‘60s and the result was a savage counter-offensive which made the situation even worse. I think we need to attack the core of the problem, which is that we have an economic system that, by its very nature, will always reward people who make other people’s lives worse and punish those who make them better. I’m thinking of a labor movement, but one very different than the kind we’ve already seen. A labor movement that manages to finally ditch all traces of the ideology that says that work is a value in itself, but rather redefines labor as caring for other people.