A really bad moral dilemma

Here would be a really bad kind of moral dilemma:

• It is certain that unless you murder one innocent person now, you will freely become a mass murderer, but if you do murder that innocent person, you will freely repent of it later and live an exemplary life.

If compatibilism is true, such dilemmas are possible—the world could be so set up that these unfortunate free choices are inevitable. If compatibilism is false, such dilemmas are impossible, absent Molinism.

We might have a strong intuition that such dilemmas are impossible. If so, maybe that gives us another reason to reject compatibilism and Molinism.