If you don't think this is about religion, then you don't understand Osama Bin Laden, you don't understand your enemy. This is about reconquering Europe for Islam and killing those who don't want to convert.
This is definitely not about Western encroachment on their way of life. The Islamo-fascists hate the existing old power structures almost as much as they hate the power structures.
I still think your Clinton analogy doesn't make sense in this context at all.
Not a dominant strain of Islam at all, the adherents total less than ten percent of all Muslims, even by the most aggressive estimates.
"If you don't think this is about religion, then you don't understand Osama Bin Laden
if you believe that Usama bin Laden can lead a Muslim Holy War, then YOU don't understand the enemy.
As a Muslim, Usama bin Laden can no more call or lead a Muslim religious war, than I as a Roman Catholic can canonize Mother Teresa.