Like him or not, Riv does have some intelligence. That said, he demonstrates some ignorance too. I think it is mainly due to his age. He makes absolute statements on limited amounts of data, which is part of the impetus of youth. And, he allows his bias to enter his analysis, but that is something that just about every fan is guilty of.
Here's my advice. Allow him to spout off with something that will eventually result in a foot in mouth situation, and then call him on it. It won't take long, just have a little patience.