I think you have some very good points. But I think you are missing some points. I believe you think only disadvantaged people become terrorists. But if you look at the people who have made the news they had plenty of advantages. Look at the couple in California who attacked their coworkers. They had a life that was better than most people in this country. Or go all the way back to Osama bin Laden who was super rich.
I do agree that poverty and discrimination may influence some people. But I think the desire to enslave women prisoners and participate in hands on violence is one of the primary motivation for ISIS. I am not religious but if I were I would say they are just evil. Some are clearly insane. Some are influenced by propaganda that is far from the truth.
I liked your article and I hope you will check out my google + page where I concentrate on ISIS and Hillary Clinton. If I can prevent one person from joining ISIS or voting for Hillary Clinton then I will be happy. I believe Hillary helped to create a situation where ISIS could grow. I also think Hillary is very corrupt and her email security crimes were just a way to hide her public corruption. There should be a link near my name.