Do you really believe that?
I'm off a mind that these terrorists are smarter than some people like to believe, and they know us better than some would like to admit. They saw an oppourtunity to play off the western world's media addiction and help the anti-war left. The primary point was to scare and horrify westerners, but the abuse scandal gave them an oppourtunity to excuse what they were going to do anyway, knowing that many people wouldn't bother considering the fact that decapitating some innocent person who had absolutely nothing to do with the abuse was compeletly disproportional to the crime the beheading was purporting to address. They knew those people would focus on the why as the terrorists saw it. That they were right, and many people did, should give pause to everyone.
I don't think they care too much about the scandal at abu ghraib, but they noticed that
we cared, and they took advantage of that fact.
I think they'd be decapitating people today whether those pictures came out or not, because moslems have been decapitating people for 1500 years.
http://tribunetimes.com/news/opinion/2004/09/21/2004092139686.htm