The crisis at La Scala has escalated out of control, and Italy is fascinated. “The crisis has gripped Italy the way steroids in baseball have the United States and stunned many with its speedy onset, coming just three months after the giddy celebration of a three-year renovation of the 18th-century house. The crisis stemmed from the dismissal last month of the general manager, Carlo Fontana, whose relations with Mr. Muti were rocky.”