They behead children, rape, pillage and, in general, impose all those proverbial "moderate" democratic values against this brutal "dictator" Assad.
It seems that US is getting a kick out of supporting all kinds of Islamic jihadists starting from Soviet-Afghan War through present day. And here is a thing--when in 1941-42 Soviet Union started to inform the Anglo-American Allies about atrocities Nazis committed on Soviet territory those facts were...dismissed out of hand as propaganda. Well, we all know how that turned out to be. Today's reality is such that US has lost not just some but any high moral ground after providing a "stellar" record of supporting all types of scum from Kosovo criminals to Al Qaeda associated terrorists, so when it was stated that US-supported "moderate" so called rebels are nothing more than terrorists there was a lot of indignation on the part of State Department. Well, what does State Department think now? Not that they didn't know that they supported terrorists or maybe....drum roll...they didn't, since new US "elites" long ago lost any ability to recognize an ultimate evil.