He shows that most philosophers are both ignorant of and misinformed about Aquinas and the arguments for classical theism. Consider the case of Antony Flew, who after a long and distinguished career as a philosopher, encountered Aristotle for the first time only a few years before he died! How is that even possible?! Flew, like many other philosophers, simply received no education in classical philosophy. At best, the Academy might instruct its philosophy students for one, maybe two, sessions on Aristotle, Aquinas, etc. but they never look back after that. Classical philosophy is a mere footnote to the “real” project of modern philosophy. And during the few times classical philosophy is studied, the Academy does not refer its students to the primary sources, but to secondary sources written during the modern period - e.g., Russel.
Not only is there an ignorance of classical philosophy, there is a terrible misunderstanding of it. Since no one has actually taken the time to read the primary sources and become acquainted with what classical theists are actually saying, modern philosophers tend to misunderstand concepts of classical philosophy and read into them modern notions. This results in a very biased critique of classical philosophy.
And, again, since no one actually bothers to look at the primary sources and tries to understand what they are saying, these critiques become a part of the academic consensus. A loop of misinformation begins to take shape, and you have the blind leading the blind.
It is very much like modern day Protestants seeing the history of Christianity through Reformation lenses. They are, by and large, ignorant of the ancient Church, and the few times they do look into it, they read into it Protestant notions.
I encourage everyone to read The Last Superstition.