March on Rome was kabuki theater.
Socialists were organizing protests and strikes, were demanding king and liberals to surrender to the supposed anger of the masses.
"You have no choice, the masses have spoken!"
So king and liberals have let Benny stage a angry mob of his own. Then king said to socialists:
"Well, I had no choice but surrender to Benny, he had march of angry people and everything!"
to which they could only reply incredously:
"but, but, you were supposed to surrender to us!"
March of Rome was one big troll Benny, king, and liberals pulled on socialists.