He has been working closely with the repugnant David Kirby, and has published opinion pieces devoid of fact or critical thinking in several places, including (unsurprisingly) the Huffington Post. See him peddling half-truths and paranoia here, as well as displaying a complete misunderstanding of scientific evidence when lamenting the fact that court cases on the purported vaccine/autism link is based on evidence rather than opinion: “vaccine court gives overwhelming weight to written medical records which are often inaccurate -- over all other forms of testimony and evidence. Observations by parents and other caretakers are given little weight.” A typical, willful failure to see why anecdotal evidence is disregarded in science and why science-based categorizations of ailments are preferred to untrained observer’s diagnostizations.
He also emphasizes that the fact that science disagree with caring mothers’ conviction that their children’s autism was caused by vaccines, means just that scientists and professionals hate mothers. He also recommends chelation therapy for children with autism.
More insane paranoia and conspiracy mongering here, here, and here (and as a follow up to that last post, see here). You get the idea.
Diagnosis: Kennedy is a traditional crank and deluded conspiracy theorist who is thoroughly anti-science (even on the topics on which he is right, he relies almost exclusively on non-scientific arguments); a typical crank and crackpot with little aptitude for actual evidence (as opposed to twisting any fact to look like evidence to lay people). He is enormously influential, and must be considered one of the more dangerous people in the US today.