I think he was trying to be personable by asking where he was based (a dumb question) and trying to be charming with the joke about not going to hold the "devils digest" thing against him... but in the moment I believe he was completely clueless that this was a publication that covers his team and that it is called "devils digest" for that reason....you don't think he was joking? The joke may have been framed poorly and he came off as too serious... ...but I thought he was trying to joke with the reporter when I heard it. I'm not a huge Herm fan, but I think he's getting a little too much flack for it.
fwiw - I know someone that played for Herm, and loved him. I'm not saying Herm's a good coach, but I do think the man will recruit some decent players based on his enthusiasm alone.
Also, that same thing with his over-enthusiastic personality is a reason that players and peers love the guy. It's genuine. But he's very much ADHD and that manic mode shows up in his management of games and in his press conferences - not in a good way.