Machiavelli is reality, it has provided useful advice for centuries. That aspect of Ender's Game only reflects the truths put forth by Machiavelli.
Study William Tecumseh Sherman, or George Washington.
Sherman - wipe out their ability to fight back, very Machiavellian. Washington suppressed the Whiskey Rebellion with overwhelming military force. Of course Washington was fighting against intelligent men who had valid grievances, so after the federal government's will to use crushing military force was proven, he later pardoned some of the leaders of the rebellion.
And if you want to deal with a street mob, first take some walks in their territory and learn about them.
Am I sensing a bit of liberal feel-good understand the poor little babies it's not their fault kind of thing? If I were to do that, it would only be to better learn how to take them down. They're feral, they live by force, they respond to force. Maybe I have a different take on this because I have been accosted by a gang before.
Your sensors are faulted. I’m talking about dealing with real gangs in the street. I almost wish I could take you for an exciting wee walk under the urban sun in August, and you’d learn soon enough how to handle street thugs. Or, that is to say, see what your fantasies are.
Just how is Italia these days, Mr. Machiavelli? Why, Mr. Machiavelli, there it is, they followed your advice.