Yes, the terrorist killings in Syria.

Who has been doing all the killing of civilians?

Oh.....wait.....turns out it's the Syrian government and the dictator Assad's army, his terrorist army:

https://www.washingtonpost.com/world/islamic-state-has-killed-many-syrians-but-assads-forces-have-killed-even-more/2015/09/05/b8150d0c-4d85-11e5-80c2-106ea7fb80d4_story.html?utm_term=.92085b151643

And their Russian allies have also killed more Syrians than ISIS:

http://www.thetimes.co.uk/article/russia-has-killed-more-civilians-than-isis-kg7wfsw8w

.