You’re acting like this is a right wing play, but the tactic of using fascism as an insult toward left wing parties actually has precedent even within left wing politics. [Before world war 2, even.](https://en.m.wikipedia.org/wiki/Social_fascism#:~:text=Social fascism (also socio-fascism,dictatorship of the proletariat and)
You can read more into Karl Popper’s Paradox of Tolerance if you want to harden your philosophical position for what you have described.