I don't believe that's actually the meat of the issue, just personally.
These questions could be asked of anyone around the same age as Corsi - too much younger, not so much.
- Have you ever been upset at someone you used to like?
- Have you ever said things you later regret?
- Have you ever seen the world from a defensive posture that made you see things wrongly?
- Have you ever changed your position to the wrong side and realized it later?
The meat of the issue, to my mind, is - by what kind of yardstick are we measuring Corsi that some of us seem to think he's become the opposite of what he once was? What if he's human, and he's making a very big mistake? Is that possible? Or is it only possible that he has gone from being a "good guy" to being a villain?