I’m surprised to hear that Germans in the 1930s thought negatively about English imperialism. My understanding was that the German leadership at the time was impressed by English imperialism in the way you might be impressed by a financially successful cousin. Do you know if this view was like a populist view of the people but not the leadership, or if it was a niche view among the people, or have I got the views of the leadership wrong?
Germany also had some very liberal and intellectual pockets in the, 20’s before Nazi takeover. It wouldn’t be that surprising if the view of German academics in the 30’s reflected that.
I haven’t read the book, but his other interviews sound like it covers that in between episodes on Ireland. Be prepared for Nazi “mistakes” about ethnicities that conveniently justify invasion.