As far as I know, Tom Clancy doesn't do that, at least not on the same scale.
How would people react if someone made a movie about MLK in which he was portraied as a murderer? I don't think people would take very kindly to that. I certainly wouldn't.
Or those authors who have written of actual people and events as a fictional 'friend' (Reagan bioigraphy, God and Generals, etc). Again, real people and events, false story.
i guess we'll agree to disagree.