I listened to him about a year ago.

He repeatedly made very strong anti-militia comments and pretty much ridiculed patriots, the Michigan Miltiia etc.

He was also very off (okay he was 100% wrong) on stuff he said about guns and gun laws.

When I tried to discuss it I was severely flamed by him and some of his disciples.

If he was off on those things and refused discussion and correction I would question his knowledge about other things too.

Listen with a grain of salt. He claims to be a libertarian but his politics fall to the neocon or liberal side in reality.