The United States has been at war with Islam since President Thomas Jefferson sent the Navy to attack the so-called Barbary Coast pirates at their bases in 1801. Those bases were the semi-independent Ottoman Empire provinces of Tunis, Tripoli, and Algiers, plus the kingdom of Morocco.
The war simmers, flares up, simmers down, and flares up again. They really don't consider anyone not of the faith truly human, and we don't accept their categorization and treatment of us as subhuman "other."
Go round the world, there are few places where an Islamic population lives peaceably with non-Muslim neighbors. By contrast, there are lots of places where they don't: the Philippines, Thailand, Burma, India, Lebanon, Nigeria, Egypt, China, France, Germany, etc. And there are for sure people in San Bernardino, Orlando and New York City who would add the U.S. to the list.
