Durán, Durán Karen Yourish, New York COURTESY AJC. Khalid Durán thought his book on Islam for Jews would improve relations between the faiths. Instead, it has brought a death threat.Khalid Durán is a marked man. A few weeks ago, Sheikh Abdulmunem Abu Zant, a leader of Jordan's militant Islamic Action Front, charged him with apostasy and called for his death.Durán's crime? Writing a book subtitled "An Introduction to Islam for Jews" that doesn't quite toe the party line.Durán, a German citizen with a PhD in Islamic studies, now living in suburban Washington, is a liberal Muslim scholar who received his...