So killing everyone regardless of guilt or not is justified?
Revelation 19:17 - 21 (NIV)
17 And I saw an angel standing in the sun, who cried in a loud voice to all the birds flying in midair, “Come, gather together for the great supper of God,
18 so that you may eat the flesh of kings, generals, and the mighty, of horses and their riders, and the flesh of all people, free and slave, great and small.”
19 Then I saw the beast and the kings of the earth and their armies gathered together to wage war against the rider on the horse and his army.
20 But the beast was captured, and with it the false prophet who had performed the signs on its behalf. With these signs he had deluded those who had received the mark of the beast and worshiped its image. The two of them were thrown alive into the fiery lake of burning sulfur.
21 The rest were killed with the sword coming out of the mouth of the rider on the horse, and all the birds gorged themselves on their flesh.