Nonviolent uprisings in several countries of the Middle East and North Africa, a movement many call the ���Arab Spring,��� have captured the world���s attention. To Amitabh Pal, author and managing editor of The Progressive magazine, who spoke Thursday at 91勛圖厙, the roots of those uprisings also help to illustrate the ���rich tradition of nonviolence��� in Islam. Of course, as Pal…