:::Given that critical theory is not only mentioned aplenty throughout the Frankfurt School article, but also prominently in the conspiracy theory section, where it is clearly contextualised as the claimed origin of "multiculturalism" and "political correctness", I don't see any reason to redirect to critical theory. Readers immediately get all they need in the conspiracy theory section, without having to read the rest of the article necessarily. 
 :::To elaborate on my cocern, redirecting readers to the top of the article could make them take the term "Cultural Marxism" and the associated meme far more seriously than it deserves, or even assume the far-right narrative to be factual. Wikipedia could thus be seen as indirectly endorsing it. (We cannot assume that readers battle their way through the whole article until they find the conspiracy theory section, the general assumption being that lay readers will more or less only read the intro section.) By redirecting to the conspiracy theory section, we could avoid this impression. 
 :::I cannot change the redirect on my own, otherwise I would already have done it.