ISIS - Que Bono

I have a few questions regarding ISIS, AL-Qaeda, etc.:

1. Why is it that the general public knows more about these groups than basic economics or other local issues that directly affect them?
2. Where do these groups get their money?
3. Who provides their training?
4. How do they get intell and who provides it?
5. How do they maintain supply chains?
6. Why do they have known operational basis?
7. Who benefits from their existence?

 Why are these questions not being asked?