Giovanni, is the opinion of this friend of yours also yours? Since you're not commenting on it, it seems that way, and frankly does little to encourage much discussion on the subject.
Feelings and points of view on this topic are many, and at times very potent in their form, and with "discussion-starters" holding no more information than a picture of the 9/11 attack with a caption like then one you descibe I see little to no chance of success in getting much discussed on this subject.
There's been an number of interviews with a number of (moderate) muslims from many parts of the world these past weeks (with all the fuss over the satirical drawings of the Prophet Muhammed), which makes the sentiment that Islam being no more than the result of the 9/11 attacks, seem very narrowminded.
So, please, if you want to start a discussion on a topic as "hot" as this is, do it with a little more finesse.
Thanx for your concern about my posting. I shall gladly start a discussion with a little more finesse - btw, what make is your Horn? Besides my Schmid Wagner Tuba in F, I also have a Triple Horn in F/Bb/F-alto. The Schmid Triple was the best investment ever.