[Ali Imran]

The origin of evil is a riddle to us, but there's a simpler and the most common question people have regarding God: Why does a loving God allow evil and suffering? Here's a poser for you - what do you propose God should do about it?

I'm not sure what you mean by evil. To you, a child stealing a lollipop is the same as a mass murderer.

Haven't you heard of "yawm al akhirah", aka judgment day? That's when we all get to see those who choose to do evil face justice. 

We are told to expect tests here on earth, of various kinds, as explained in the Quran 2:155. These may cause us to suffer. For those who are patient, a great reward is promised. So there, a simple answer to your great 'evil and suffering' question. If we want to see the picture, it is now showing in Palestine. One side doing great evil and another side is going through great suffering. Evil and suffering.