PISSI is massacring the 15000 or so Palestinians that remain in Yarmouk refugee camp after two years of siege by Assad's army.

With Syria being fought over between Assad's forces and jihadis, both sides are horrible, so what should the world do? I don't see any answer, except to defend the Kurds.

I blame this state of affairs on the rich Arab countries that stirred up the violent jihadism when Syrians were doing peaceful protests for democracy. As I recall, they were Saudi Arabia and Qatar. But the US is also to blame, for supporting them (which it continues to do).