Society has a bad habit of mocking those they don’t like. Kicking a person when they are down. It seems right that we get the last laugh at the expense of an enemy. It’s only fair, they had no remorse for you right? The Bible tells us not to rejoice when our enemy has fallen. As hard as it will be, it’s our Christian responsibility to love an enemy, and show regard to them (Prov. 25:21-22).
God said vengeance is His. Allow God to do things in his time. Otherwise, your rejoicing will cause God to turn his wrath away from the enemy (Prov. 24:17-18).