It is a difficult issue, because as Christians it is not ours to avenge, but to leave it to the Lord. However, most Christians agree that there is such a thing as a “just” war when a greater evil is prevented. A good example is World War II and the ultimate death of Adolf Hitler.
There was a great German pastor in World War II named Dietrich Bonhoeffer who opposed Hitler. Bonhoeffer even participated in a plot to assassinate Hitler, and he was a Christian pastor! Why would he do that? Because Bonhoeffer knew that it would stop a greater evil.In the Old Testament, Moses was sent to Pharaoh and told to demand justice for the Hebrew slaves. God even sent a “death angel” as a final plague upon the Egyptians to set the people free. When the Hebrews fled across the Red Sea and Pharaoh chased them, God allowed the Egyptians to drown in the sea, and Exodus 15 records the song of rejoicing that Moses sang at their defeat. That is why Proverbs 11:10 says that when the wicked perish, there are shouts of joy.
How do we reconcile this with Jesus’ words in the Sermon on the Mount about turning the other cheek and loving our enemies? I think we need to make a distinction between personal offenses and social justice. While it is a virtue to overlook a personal insult, it is not a virtue to overlook a tyrant who is oppressing a people. The former act would be consider an act of grace; the latter would be considered a gross negligence of justice.
I cannot judge the hearts of those who shouted and jumped for joy at the news of Osama bin Laden’s death. I’m sure for many, it was a hateful rejoicing at a man’s death. However, for others, it may have been more of a celebration of justice being done, as we find in some of the psalms, such as Psalm 69:19-25. This psalm is quoted by Paul in Romans 11:9-11, and is applied to the death of Judas Iscariot by the early church in Acts 1:20. You will notice in Psalm 69 that the psalmist does not ask for an opportunity to personally harm his enemy, but he asks God to bring about justice, which is actually the same thing we read in Romans 12:19, where we are told to “leave room for God’s wrath.” Thus as a Christian, I do not rejoice that a man is dead, but I do rejoice that God executed His justice to end an evil terrorist who will never be able to blow up another building or murder any more defenseless people.