the Frankfurt school is something I encountered
Hi, 16 words does hardly a rant make. If you are aware of the Frankfurt school's objectives and are defending them, this would presumably make you a marxist adherent whether knowingly or not. Of course, those at the school eventually realized that marx was incorrect in application of his theory on how to take down western capitalism. His was intended as an economic method, while those at the Frankfurt school ( known as the "Institute for Social Research") revised marx's revolutionary theory into cultural terms. The result was a spectacular success. We see the end product of it's intention everywhere it was applied. This took time, using the techniques of planned patient gradualism. I don't know the book you are referencing but the Frankfurt school existed and it's intent clear. A book you may deride as ridiculous (I don't know which one you refer to) may contain historical references to the sinking of the Titanic, but that does not change that it sank. I am aware of Freidan et al, all following and continuing the schools' lead.
For anyone else reading this, I recommend the following video on the subject of the Frankfurt school to clarify it's mandate: