There is no surer path to Muslim violence than through the legitimization of Muslim grievance. And once you accept the legitimacy of the grievance, then you are also bound to accept the legitimacy of the violence that follows.
Violence begins with grievance. Grievance is the pretext for violence and the narrative for the violence. Liberals make a fetish of separating the grievance from the violence, emphasizing constructive means of resolving the grievance. But what do you do when the grievance and the violence are inseparable?