Asking nicely and tolerance aren't the only other options or even necessarily the opposite of violence. Sometimes, it's just a necessary measure and last resort. Beating people rarely changes their mind, other methods must be used, like reasoning and education (preferably even before the person has gone fascist). Obviously, the reasoning isn't gonna work with everybody, in which cases you do whatever must be done to ensure safety.

Think of fascism as if it's a zombie pandemic. Once it's in progress, you save those that you can and liquidate those that are too far gone. But the real method against a zombie pandemic is to have preventative measures in place, like not letting Umbrella Corp. develop the virus in the first place.