Early in his introduction, Glen Stassen asks why a book on the Sermon on the Mount belongs in Jossey-Bass’s series called Enduring Questions in Christian Life. The Sermon on the Mount is indeed an enduring question as well as a central biblical text.
When someone asks me why Muslims don't denounce terrorism, I suggest that he or she Google the words “fatwa against terrorism” (80,000 hits), or name cities in the Muslim world that held major demonstrations against the 9/11 attacks (Tehran, Karachi). Most Muslims do not approve of terrorism. Their response to it is fear—fear of extremists who seem unconstrained by mainstream Islamic law, fear of a son or daughter becoming a "holy warrior," fear for the future of an entire faith community.
Karl Barth’s theology grew out of the task of preaching, and he always kept that task in view. In a radio interview not long before his death, he noted, “My whole theology, you see, is fundamentally a theology for pastors.