All Muslims must stand together and not only condemn them but work together to defeat extremists like ISIS. Some critics of Islam blame the strict interpretation of Islam by Wahhabism a Saudi strand of Islam and the teaching of children to curse and hate kuffars for the rise in fundamentalism and extremism.
Peace, like democracy, cannot be imposed from above, or from outside. But if the two sides in Syria's civil war can agree to at least a few temporary local truces, they may be better able to turn their attention to IS. That's certainly what would be in their best interests, and in the interests of their foreign backers, whether Iran, Saudi Arabia, Qatar or Turkey.
The recent migration of many jihadist organizations to social media reflects a desire to expand their targeted audience one step further. Password-protected forums - up until recently the main virtual gathering place for al-Qaeda supporters - made content particularly difficult to access for wannabe jihadists, while also representing a common target for the security services' disruption efforts.