In Judges, chapter three, verse twenty-one, Ehud’s action was not murder but an act of war under the direct command of God. Ehud responds to their cry: for the Israelites who had been serving Eglon, the King of Moab, for eighteen years. The rescue was not done by the servant alone, for it was God that he responded in submissiveness. Ehud was the son of Gera, a Benjamite, who followed in obedience to the Lord to carry out the order on Eglon, the King of Moab. He did it accordingly, to the way God had ordained it to be, as described in verses sixteen through twenty-three.
Under the new covenant, the holy war of Israel as a theocracy continues through spiritual warfare against satan and his demonic forces. Today, believers no longer have to take matters into their own hands, as in the Old Testament. In the New Testament, the battle is spiritual and no longer physical. Since God sent His Son, Jesus Christ, who died on the cross to take away our sins, the believers’ responsibility is to counter the power of darkness through prayer. The saints of God have a right to openly and verbally bind the devil and his demons with the blood of Jesus to receive victory.
However, there are conditions for believers and those who desire to serve the Lord in spirit and truth. We are not to do what the Israelites did in the past, where they did evil in the sight of the Lord in verse twelve by serving other gods or following the ways of the world and the idols therein. We must be obedient to God’s Word and not do evil things to be able to stand against the sin that permeates our society. A person cannot fight for justice to God if they live in sin.