Why do we still fight in the name of religion?

As an atheist this picture breaks my heart. Does it really matter whose "god" is the right one to believe in? Does your god or anyones help bring back this little boy ?

The human race evolved to be the dominant species on the planet, yet we kill each other over who believes in the "right"  man in the sky.

This was taken near the Dar El Shifa hospital in Aleppo after three suicide bombers detonated cars packed with explosives in a government-controlled area of the city. Coupled with mortar attacks, the day saw at least 34 people killed and 122 people were injured; you can read about it here.