So what are we to do? Hold a grudge forever? If you like. But Jewish tradition tells us that there is a God, there is Ultimate Reward and Punishment and that we should never lose sight of that fact. What goes around comes around, Measure for Measure is built into the fabric of Creation and the righteous prosper while evil withers away.
We certainly see that on a national level with the Jewish people where our enemies have disappeared to the trash heap of history while Am Yisrael continues to grow strong and successful. We should never forget this and take a lesson from it so we know that even on an individual basis the good guys come out on top and the toxic negative people self destruct.