As I have said quite a few times before, it is simply wrong to say that Islam and Christianity have much the same view of war and peace. Judging from its founding texts, Christianity is a pacifist religion, for its founder rejected violence. Islam’s founder was a warlord.
As I have also said quite a few times before, the real issue is not violence or terrorism but theocracy. Islamist violence stems from anger that Islam’s theocratic potential is being thwarted. Again, it is Christianity that is different: its founding texts reject theocracy. For many centuries this was obscured, but then it was gradually understood and put into practice – which entailed the invention of modern politics, as I explain in my new book God Created Humanism.