Never silence your enemies. Don't you want to know how they plan to destroy you?
Discussion
No, you need to let your enemies stay silent. The more they speak, the more they lie (most of the time). That's how public narratives are created and that's how people fall into their trap. What you should do is keep a close-eye on "allies." They have the potential to be your greatest threat.
I have my doubts if someone with destroying aspirations can be so selfless to plan to destroy me. they probably are trying to take something they think is missing in their lives.
I agree about not silencing anyone. if we are trying to silence our called enemies, we are probably doing that to ourselves - to the parts of us we don't like and want to hide, especially feelings. and I don't think the way to change is to hide or silence anything.
I'd recommend the "48 Laws of Power" and the "Art of War". It has been used by courtier and the modern politics. They are very useful wherever you are. The environment may have changed, the players may have changed but the rules are still the same — human nature. The one you need to worry the most are not always the fascist. But wolves wearing the sheep clothing; they are the most dangerous one. They smile in front of you, they let you hear what you need to hear, before you know it, you are only part of their game plan. Unsuspecting person with lack of self-awareness will full prey to this trap. Sadly, it happens so many times not only in politics but everywhere where human is involved: it is within our nature. ☺️