John L. Esposito is professor of Religion and International Affairs and director of Prince Alwaleed Bin Talal center for Muslim-Christian understanding at Georgetown University. His most recent book is "The Future of Islam." (CNN) -- Hosni Mubarak's resignation resurrected a tsunami wave of articles and commentaries on whether Egypt's Muslim Brotherhood would now come to power. And yet, few have asked why the primary leaders of grassroots revolt in Egypt and across the Arab world curiously have ...