I've followed this case for years and I think you've mis-characterized Warren here Tyger. I honestly do not think this is about selling books for Warren.
You have to bear in mind that this is just one interview out of many relating to the incident. The number of years and personalities involved has created a great deal of controversy and downright feuds among the participants. Warren and the rest of them always seem to express a great deal of emotion when they talk about this incident and it seems to get more intense as the years go on. I think Warren comes across as someone who is dealing with a lot of anger about the incident, even after all of these years, and that explains a lot of his behavior in my mind at least.
I think that's correct, TO, but his anger is surely based in more than the way he and his experiences have been manipulated and distorted all these years. I think it's rooted in the outrage and frustration all of us feel when we become aware of the massive distortion of reality carried out through disinformation and mind manipulation by the PTB to suppress the significance of the ufo phenomenon for the last 60 years.