From an editorial Wednesday in the Washington Post:
A string of horrific suicide bombings linked to the Islamic State, all in Muslim nations, underline a crucial truth that has been ignored by Donald Trump and many others in the West: Terrorist jihadism is above all a war within Islam. Muslims have been its first victims – and they are the only force that can bring about its definitive defeat.
Though it is losing territory and leaders in Iraq and Syria, the Islamic State has marked the last days of the holy month of Ramadan with a formidable offensive. Successive attacks in Istanbul, Dhaka, Baghdad and in Saudi Arabia killed at least 290 people and seriously injured hundreds more.
The events of the past week ought to make it clear that Sunni Muslim governments face a mortal threat from the Islamic State. A policy that regards the two sides as indistinguishable – that, say, bans all Muslim entrants to the United States – could have the devastating effect of weakening the very forces that are, for now, the only alternative to the jihadists.