He can be kind or he can be cruel. He can be a humanist or he can be an oppressive tyrant and killer. Leibniz, the 17th century philosopher, is one of those who believe that man's freedom is the cause of evil. So God decided to make man free although sin inevitably brought punishment. This view can explain wars and social injustices, but can not explain earthquakes, death, illness, etc.
Evil is a negative thing.
What we should say at this point is that we commit a mistake by using the term evil. By doing this we have not done anything against reality or any logical necessity. In the term evil there is a concept of injustice hidden. We shall avoid using it, because it is a loaded word. The limitlessness of our desires from one hand, and the mathematical nature of the universe on the other, is the cause of our illegitimate annoyance.