Several thousand black-clad fascist sympathizers chanted and sang in praise of the late Italian dictator Benito Mussolini on Sunday as they marched to his crypt, 100 years after Mussolini entered Rome and completed a bloodless coup that gave rise to two decades of fascist rule. The crowd of 2,000 to 4,000 marchers, many sporting fascist symbols and singing hymns from Italy’s colonial era, was more numerous than in the recent past, as the fascist nostalgics celebrated the centenary of the March on Rome. On Oct. 28, 1922, black-shirted fascists entered the Italian capital, launching a putsch that culminated two days...