cluster rockets ? its a rocket artillery salvo. 90% of the rebels now are al qaeda/nusra/IS and other foreign jihadi terrorists, the revolution is long dead.
of course there have been atrocities on both sides but the Syrian government are angels compared to what constitutes the opposition now.
it also doesn't help that there is an arms embargo because of the civil war and the military only has 'dumb' munitions like rocket artillery and the notorious barrel bombs to rely on.
end of the day, all war is ugly.. just look at the recent gaza conflict, Israel, with all it's state of the art smart bombs and fighter jets and 'knock on roof warning' missiles etc still ended up killing mostly civilians.
I think behind the scenes the US is engaged in intelligence sharing with the Syrian government now, even their 'dumb' freefall bombs are suddenly more effective and hitting the rebels/isis/nusra than civilians.
a good solution would be the local rebels disarming, foreign jihadis either leave or are neutralized, and Assad steps down. The violence has to stop though, that's an obvious pre requisite for any political change.
Very messy situation, gotta feel for the people stuck in the middle. :S