Given that the oil industry pretty much wrote the book on modern business collusion and conspiracy to commit fraud, it's not that much of a stretch for him to come to such a conclusion. Especially when you read about what so many climate scientists have had to endure in order to do their work. What is becoming increasingly clear to a lot of individuals following the science is that the problem is far worse than most of the public is aware of at this time. Honestly, I don't think they want to know. When you listen to some of the far end alarmists—man is it hard to hear. Some of the worst case conclusions are profoundly devastating. There's a lot on the line and his paranoia may be more illustrative of the psychological toll such knowledge takes in addition to losing so many colleagues in such short order. Ultimately, our whole way of life is targeted for assassination at this point.

Edit: Capitalization