I think you guys confuse revenge, with self-defense
Here's a good link that will answer this question...although I doubt any of you will take the time to read it. Here's just some scriptures used as evidence.
"Out of His mouth comes a sharp sword with which to strike down the nations. He will rule them with an iron scepter. He treads the winepress of the fury of the wrath of God Almighty." Revelation 19:15
“There is a time for everything and a season for every activity under the heaven…a time to kill and a time to heal, a time to tear down and a time to build…a time to love and a time to hate, a time for war and a time for peace.” Ecclesiastes 3:1, 3, & 8
Jesus Himself said, “Do not suppose that I have come to bring peace to the earth. I did not come to bring peace, but a sword. For I have come to turn ‘a man against his father, a daughter against her mother, a daughter-in-law against her mother-in-law---a man’s enemies will be the members of his own household’” Matthew 10:34-36
"From the days of John the Baptist until now, the kingdom of heaven has been forcefully advancing, and forceful men lay hold of it" Matthew 11:12