The lesser evil generally is whatever someone decides is more tolerable than the status quo. However, in the realm of God's kingdom, there is no evil that is considered acceptable, or tolerable, nor is there any evil that God deliberately would visit on the people of his kingdom. All evil must be eradicated. If you have bought into the idea that God visits evil on people because of their sin, you have bought into the devil's way of thinking and reasoning.
God has stated numerous times that his role is to get us beyond the negative circumstances, he never visits those circumstances on us, nor does he encourage them to remain in place in order to achieve an agenda. God desperately desires that all negativity end, and that they end promptly. When you understand God's perspective, you know that in every instance of negativity in the kingdom of God, and among the people of God, it is imperative that you do everything in your power to eradicate it.
The Lord God Almighty reigns in the earth, under the earth, and over the earth, and his kingdom will have no end. Nor will eternity cease to be.
The Lord God Almighty El Shaddai