Like the rest of us he has free will. But as I pointed out to him he also has karma. If he starts a nuclear war and destroys civilization his immortal soul will be bound to rebirth for countless suffering lifetimes. He will not know why he suffers in those future lives. But the angels of karma will know, and they will lead him into difficult lives that are intended to purge his soul. The only thing we who he annihilates can do is forgive him, and pray for his soul.
Would you then say, if you saw him suffering in a future incarnation, possibly on another planet, that he did not deserve it?