Osama Bin Laden laid out in his letter to President George Bush....
Full text: bin Laden's 'letter to America'
I haven't read it, but like the majority of Muslims pretty much know about the main grievances.
So, then it's Arab nationalism more than it has anything to do with religion. So, it's an Islamic variant of the KKK. I think most Westerners can understand the KKK, so if it was presented that way, it might be easier to communicate their message. It doesn't mean people would accept it or agree with it, but at least it would give greater clarity and reduce the confusion and distraction over questions about whether Islam is a peaceful religion. It would seem that even those who believe in Islam and want to convince others that it's peaceful, it would be better to oppose this form of nationalism which seems to be the underlying problem.