This is completely unjustified and unprofessional:

Now, Kevin [Burton] is not one of my favorite people. I’ve had repeated run-ins with him that have convinced me that he’s the most dangerous kind of idiot: the stupidity made coherent kind.

FWIW, I haven't met Kevin, but we've had many long debates via email. I don't agree with him a lot of the time, but I do respect him and his opinions.