What mention I have found in the Kansas City newspapers of the time was buried a few pages into the paper -- this in the area where a majority of the surviving Quantrill men lived.
Those surviving in 1924 were about 80 years of age, and it's most likely that, if they were aware of Uncle Billy's fairy tale, either laughed off the old man's story or gave it all the consideration it merited -- none.
You can, of course, supply us with the names and dates of these numerous publications in which Uncle Billy's story appeared, can you not?
Are you able to provide a credible source for your statement that the fairy tale "...was even widely discussed among Bill's wartime comrades." While you're at it, give a source that, at the very least, provides an idea of the gist of those alledged discussions.
All you've shown to date has been bluster and complaints that a vast consiracy of "traditionalist" (I prefer the term "responsible") historians has deliberately hidden, destroyed or altered records in order to keep you from discovering the "truth." The truth is that Uncle Billy told an easily debunked tale, and that you -- and a handful of people who never found a conspiracy theory they couldn't embrace -- have swallowed it hook, line & sinker.