Yes, Prager commits this fallacy so often that he has come up with a Pragerism to justify it: "Generalizations are the root of wisdom."
With thinking like that, it is not hard to imagine why Prager might have had a hard time in academia. It's very easy to come up with half-baked theories, but it is very difficult to do the work required to test them. Not everyone is cut out for the rigors of academia, I know I wasn't. My half-baked theory about Prager is that he resents academia for his not being able to do the work.