To start with, The author writes:"Purpose: Quranic verses permitting military jihad (22:39-40) indicate that it is not a vehicle to expand Islam but to defend the rights of those who are persecuted because of their religion."
Total fantasy and an utter revision of history.
What is author is really proposing is creating a generic monotheism, influenced by western liberal traditions and Christianity while still preserving some outward, cultural practices- its not islam, never was. I'm not disagreeing with his goal. I hope its successful. Its just that what he is saying is not in the book and not in the history. Some muslims do say that jihad is spiritual struggle. Some of those muslim groups have institutionalized that view. They are the muslims who don't follow the Koran.