~implying the death penalty is a just punishment~
har har har....
Naofumi got *his* revenge. That is all that matters to him - as Kraco pointed out, it doesn't matter whether the people of the country have open business with them, he has not.
Naofumi doesn't want to be the *reason* for their execution, it's as simple as that. What's the point in executing them anyway. I think they got off too easily too, but I'd prefer prison time for them over execution any day.