When Sunni rebels rose up against Syria's Bashar al-Assad in 2011, Turkey reclassified its protégé as a pariah, expecting him to lose power within months and join the autocrats of Egypt, Libya, Tunisia and Yemen on the scrap heap of the "Arab Spring".
The U.S. decision to air-drop weapons to Kurdish forces in Syria on the same day Turkish President Tayyip Erdogan dismissed them as terrorists is the latest false note in the increasingly discordant mood music coming out of Washington and Ankara.
Residents of a Turkish border town, an hour's drive from where Islamic State is battling for control of Kobani, appreciate the quiet they say the Sunni militants brought when they swiftly seized neighboring Syrian territory.