Protests, marches, sit-ins, boycotts—all these nonviolent techniques have been employed in support of the Palestinian cause, but violence has remained at the core of the enterprise.  For decades, well-meaning people have suggested that a wholehearted embrace of nonviolence would do more for the Palestinians than their continuing resort to terrorism.  Now comes word of the Global March to Jerusalem, scheduled for March 30.  Don't look to the event as the long-sought...