You know, the Jews were a warlike people. The God they worshipped was entirely different than the loving Father revealed by Jesus.
Hasn't it occured to anyone that when this god of love states that evil will be destroyed, that you will look for it but it will be gone, that what is meant is that the love of God has erased all traces of evil from the person practicing it? You've known people like this; people who were at one time evil and who have rid themselves of it. It's certainly "gone" and can even be referred to as "destroyed." But that doesn't have to mean that God has killed the evildoer - just reformed and reclaimed him.
We're way too fast in wishing destruction on people we consider "evil" and too hopeful that revenge will be had on them instead of taking the attitude of Jesus that God is loving and will reclaim his children - all of them. And in that way evil will indeed be "destroyed."