This view is not shared by all. Once again, I bring up one of the founders of modern radical Islam - Sayyid Qutb. I have never read any of his documents; I have read a historian's account of his documents. Mr. Qutb supported jihad in order to preserve Islam as a choice. He didn't care if people didn't convert; he just wanted them to be aware of the existence of the message.
Do you feel that all radical elements of religion must be excised with prejudice and absolutely terminated? What about Kahane?
Kahane is dead, BTW.