Plenty of news sources come up in that Google search so you say "hearsay" and I say "reporting". Either way, the guy has literally thousands of hours of podcasts. I don't think someone needs to have listened to every single minute to have an opinion on the guy.
There is also a difference between someone with "contrarian views" and someone with dangerous views. I got no problem if he has someone on to talk about how we shouldn't introduce gun regulation in the wake of Sandy Hook. I have a problem with him giving a platform to someone who says Sandy Hook was fake, the parents who lost children are actors, and they should be harassed into admitting as much. Nothing good comes from giving a guy like that more attention, power, and money by having him on the show.