“his recollections are one set out of tens of millions” No. His analyse based on his knowledge of the Wehrmacht (and his own experience) was the first step of a new approach of the Nazi War Machine.
Before him it was the bad SS and the good Heer. Now, and he was the first to say it, the Nazi Machine was good at implicating every level of the society in segmenting and diffusing the responsibilities…
So each level could ignore the reality in denying the ultimate goal. The Jews extermination was “ignored” by the generals because done by the “political” SS.
Again, I will not explain how the Nazi succeeded to do so, but even the guy throwing the Zyclon B in the Gaz chamber didn’t feel guilty as he was just part of the machine.
Von Kageneck was the first one who show this was working within the Heer, how the Nazi succeeded to impose the notion of the “brutal” war, the “merciless” war even to the older/imperial Junkers officers.
And his findings are safer than interview of 1,000 war veterans, especially when I don’t know how it was done, as for me, it looks like the man who saw the man who saw the man who saw the bear, and he had no fear…