I don't want to discount the threat of fundimentalist religious lunatics(of any stripe), nor would I stand in the way of reasonable efforts to put them down, but lets be real here, and not blame an entire reliegon of 1.2 billion people for a handful of incidents, and fringe groups.
You a mixing a religion with it's followers. I have see no problem in blaming the religion of islam for what happened today, but I wouldn't dream of blaming the 1.2 billion followers of islam for it, as 1.199999999999999.. of them didn't have anything to do with it. The religion itself, however, have deep traditions of violence toward those who critizise or mock it, starting with the founder of the religion who himself ordered the killings of lots of poets writing critical poems about him, as well as others who dared question his legitimacy as god's prophet or in any ways mocked or disrespected him. As the prophet Muhammad is seen as the most perfect human being who ever lived, incapable of doing wrong, and is seen as an example to follow for all muslims(with his actions forming the basis of the Sharia laws), saying that what todays gunmen has nothing to do with islam is either dishonest, delusional or unfathomably naive.