If you follow Alex3917's link, you'll see he argues that Nutt is intellectually dishonest. That's of course different than being regular dishonest (i.e. fraudulent).
The thing about intellectual dishonesty is that it's not provable, and in fact usually isn't even noticed by people who agree with the conclusion. If you read the link, you'll see that these allegations are hardly the kind that would lead a university to remove a professor.