Do you have any support that he misrepresents mountains of evidence? Did you dig into the mountain and find a bunch of places where he misrepresented data? Or did you just go with your gut?
When I hear statements like this, I usually take it to mean "I don't like the conclusions he is drawing with the evidence"
In addition to what 'EMIRELADERO linked - like I said, I lived through the exact period in the American university system that Haidt reported on, and his descriptions don't match my first-hand experiences nor do they match the experiences of my peers. As a result, I do not consider him a trustworthy source. I'm not going with my gut, I'm going with my eyes and ears.
When I hear statements like this, I usually take it to mean "I don't like the conclusions he is drawing with the evidence"