As wild as it seems, parts of this idea ring very true to me. I know that many times when people are forced to do something unthinkable, they seem to have some type of mental break and once they are put on that course of action they will attempt to follow through on it, even if someone tells them that they no longer have to go through with it. It's as if once they realize that they have gone beyond rationality, they cannot allow rationality to interfere again.
I have never heard this interpretation before. Does anyone know its source?