Ha, I nearly brought that myth up as further evidence:
https://www.snopes.com/fact-check/loco-motive/
Why do people have such a false, cartoon-like, impression of what actual historical fascist movements did?
But you're right, it's much more important that he killed people:
> Fascist squads, militias inspired by Mussolini but often created by local leaders, swept through the countryside of the Po Valley and the Puglian plains, rounded up Socialists, burned down union and party offices, and terrorized the local population. Hundreds of radicals were humiliated, beaten, or killed. In late 1920, the Blackshirt squads, often with the direct help of landowners, began to attack local government institutions and prevent left-wing administrations from taking power. Mussolini encouraged the squads—although he soon tried to control them—and organized similar raids in and around Milan. By late 1921, the Fascists controlled large parts of Italy, and the left, in part because of its failures during the postwar years, had all but collapsed. The government, dominated by middle-class Liberals, did little to combat this lawlessness, both through weak political will and a desire to see the mainly working-class left defeated. As the Fascist movement built a broad base of support around the powerful ideas of nationalism and anti-Bolshevism, Mussolini began planning to seize power at the national level.