It's a much older, wider picture and bigger story than that of ISIS.
Sections of the Islamic world have always felt bitter about the rise and dominance of liberalism and secularism in the West and it's spread to Turkey, Egypt, Algeria and elsewhere in the twentieth century. Following many...
I'm no apologist for terrorists, but I think Cowfold Seagull is correct.
It's a tiny minority of Sunni Muslims advocating violence, led by some manipulative and charismatic (not to us of course) fundamentalist shite-stirrers, who cherry pick and magnify out of context a few lines from the Koran.