How should we understand the two-edged sword and the punishment of the nations?
There are three main readings. One sees it as a right of Israel in a specific war of its history. Another reads it as a vision of God's final judgment, in which his people take part. A third understands it spiritually, as the word of God, which Hebrews 4:12 calls sharper than any two-edged sword. In no case does the text authorize private violence.