I agree, and feel similarly about the inclusion of operation Northwoods.
It’s most prominently a horrifying plan that was rejected and remained classified, with the proposer being replaced shortly afterwards (it’s entirely possible that’s a coincidence).

Someone thinking of something horrible and then not doing it isn’t evidence that they would do something similar. There’s no particular reason to think they hid evidence because they admitted in the same deeply classified documents to doing far worse things.