בס''ד
If there is a "radical Islam", then that means that there is also a "moderate Islam". The reason politically correct people use the term "radical Islam" is because they want to say that Islam itself is not bad, it is just that there are some "radicals" who misuse the religion. But that's a lie. The Islamic religion itself is evil, genocidal and Nazi. There are no "moderate" versions of Islam. You cannot have a "moderate" version of a book like the Koran that preaches world conquest and the forcible conversion or physical extemination of all non-Muslim "infidels".
Therefore, Osama Bin Ladin and Ahmedinajad and Sheik Nasrallah are not "radical Muslims". They are simply Muslims. They are simply doing what Mohammed and the Koran commands all Muslims to do.