Why are children being killed in Syria's civil war?

For more than two years Syria’s children have endured 

appalling suffering. 

According to UNHCR 1,631,981 people have now fled Syria. 

More than 1 million of them fled in 2013 alone. 

In the 162 days that passed since 1 January an average of

close to 6,500 people fled every single day.

Children make up 51.5% of the refugee population, meaning 

there are an estimated 840,000 refugee children in the region.

Save the Children has worked in the Middle East for decades. 

In July 2012 we launched an ambitious emergency appeal to

respond to the growing refugee crisis in the region and are now 

aiming to raise 161,000,000 USD for our humanitarian interventions

in Jordan, Lebanon, Iraq and Syria, aiming to reach at least 

1,255,000 people.

See Save the Children's Syria Crisis Regional dasboard with key facts,urgent needs and details of Save the Children's response by country and sector.

Last time I read about the Syrian civil war that is currently being fought between forces loyal to the Ba'ath government and those seeking to oust it, I didn't see any mentioning of children taking on the role of soldiers or rebels in the two-year long civil war.

However there are more than 11,000 children who have been died in a war being fought by uncivilized grown-ups.One hundred twenty-eight  of the children who were killed died of chemical weapons, according to a British group.

According to The Oxford Research Group study "764 children were summarily executed and 389 killed by sniper fire."

The Oxford Research Group study report is terribly disturbing.Even though no children initiated the Syrian conflict or apart of the arm forces participating in the armed conflict they are being targeted viciously.

The children living in the Syrian war zones have to live in constant fear and wonder if they will die in a conflict they do not even understand.

I don't know why children are being killed in the war or even being perceived as enemies.
I do know that any person willing to kill an innocent child is a person who should  be captured and put
a way in a underworld that I call HELL!