I don't know the answer, but I constantly wonder if society has changed -- or has the media changed our perception of our society?
Way too many Americans get their knowledge of the Middle East solely from our news media (traveling requires too much time and money for many) -- and way too many Americans have a woefully skewed "understanding" and "fear" of that whole part of the world.
Methinks the same phenomenon has been at work here at home too. IMO, 95% of people are pretty OK -- esp. when you meet them in "onesies and twosies". When troubles start, they usually start with groupies -- and usually when coupled with booze and/or drugs.