SURUC, Turkey (AP) — Turkey and its Kurdish population — for decades in conflict — suddenly find themselves facing a common enemy in the Islamic State group. So it may reasonable to expect prospects for long elusive peace between Turkey and Kurdish rebels to improve.

Instead, Kurds who are arriving by the busload to join the battle are increasingly angry at a wary Turkish government trying to prevent them from crossing the border to defend Syrian Kurds from an onslaught that has left countless dead and about 150,000 fleeing into Turkey in recent days.