I think what makes people angry when confronted with this sort of answer, is not the objective truth of many of your statements, it is the point that is being overlooked. Of course many religious texts authorize brutal behavior, and certainly this has been acted upon en masse in the past. What makes people angry is that there are not legions of Christian soldiers, with relatively high approval ratings, marching into battle on the streets of Karbala and Damascus, there are not legions of Jewish militants ferreting their way into Riyadh or Kabul, nor are there mobs of incensed Hindus and Buddhists breaking down the doors of printing presses in Cairo and Amman. The problem is one of scale, scope, and repetition. To compare Islamism, Islamist violence, and Islamist groups to their potential religious counterparts in other faiths completely misses the point. It is a unique problem because of its magnitude and because of how often (daily) attacks occur on a scale that stretches all over the planet. It is not "Islamophobic" to say that this is a unique problem, and equivocating is not helpful in my opinion.