Yeah, I noticed the author of the book caught some flak from some contributors.
Well, it was a long time ago now, and I can only speak to my own experience, but if ever there was an era when college professors might have spoken like "commie pinkos", it was the Vietnam years. Yet, my professors were most concerned with helping us students learn how to use the discriminating faculty of our minds to recognize fallacies in arguments and theories, etc. The opposite of indoctrination.
I had one professor, he was from South Korea, and taught Asian history. He started every class the same way. He would stand in front of us, and loudly proclaim "History is bull****". Because he had a strong Asian accent, it always sounded like "History is boo****". And we always chuckled. It's conceivable that many didn't really understand what he meant. Well, it was his way of pointing out that history is almost always written by the victors, the winners. And so, history as written provides an incomplete picture when that is the case. We teach American history from the point of view of European settlement, not from the point of view of those who lost their land, Native Americans. And so he was saying our incomplete histories inevitably reflect bias and one sidedness. Again, this was an invitation to open mindedness, not indoctrination.
There was another professor in the department who lacked tenure. Uh, oh, gotta be careful without tenure. He preached revolution, overthrowing the government. It was his reaction to the war. It got him fired. I did not take the class that got hm in hot water, and I forget now what I thought, and what students or faculty thought.
Anyway, that was then. But in reading this guy's take, it honestly seems like he's still living in the era of Sen. Joe McCarthy and the Red Scare. It just seems over the top and very dated in that respect. And that was my initial reaction to the article
@Heathme posted. Namely, it seemed like the author was stuck in the 1950's. "How to confront Marxists" just seems like an out of touch "problem" to solve.