Uncontrolled Syria war: When will it stop? Why are innocent being killed?

Syrian army and the group of rebels has been in fierce battles long time from now. Latest news updates claim at leat 1100 lives of civilians in Eastern Ghouta. According to the resources, fighter planes covered the whole sky in Ghouta. There have been many chemical attacks in Syria in past 21 days of war taking the lives of hundreds of children and women. One question to be considered: What is the mistake of those who were killed? Whatever it takes, life of 1 innocent is always greater than death of 100 guilties. We also hope and pray for the soonest recovery of Syria.