Syria's cloak of respectability as a stabilising regional force has been ripped to shreds since the protests began in March. That is reflected in the concern expressed not only by the United States and Europe but also by its powerful neighbour, Turkey, whose foreign minister is due in Damascus tomorrow with the message that Ankara has run out of patience with Mr Assad. The president is no doubt relieved that Nato has ruled out military intervention. But he should not be surprised if foreign powers decide to arm the rebels. Despite the largely peaceful nature of the demonstrations, the violence which he has inflicted invites violent retribution.