“I oppose fascists, but I also oppose antifa” to me might as well just read “I claim to oppose fascists, but I also oppose the only thing that can meaningfully stop them from recruiting and organizing for genocide.”
People seriously don’t get that the tactic of swaying the public through debate doesn’t work against fascists. Fascists don’t need majority approval or support to do horrible things, they just need to feel like there aren’t any significant social repercussions for it. If they don’t face backlash when they spread their propaganda and declare their intention to commit ethnic cleansing, that’s when they’ll know that they’ll be able to get away with actually doing what they intend to do.
And don’t delude yourself into thinking that you can convince fascists to change their mind with reason, because their arguments aren’t meant to adhere to reason or truth. Instead, they’re performative statements with two purposes: the first is to state what would need to be true to justify their existing intentions, and the second is to signal themselves to other members of their in-group so they can more easily join together to form a coherent political force.
This is why, when dealing with fascists, the only effective tactic is to raise the social cost of being fascist, so that they’re afraid to spread fascist propaganda openly. Sometimes this means violence, other times it just means denying them a platform to spread their ideas and recruit other fascists.
Because of this, when liberals defend the “free speech” of fascists, this effectively gives fascists a space to signal their intentions to other fascists, allowing them to group together and organize. Allow fascists to organize, and they’ll commit acts of terror against the most vulnerable populations.
You don’t even necessarily have to like it when antifa resort to black bloc tactics, but if you oppose antifa in general, you’re a stooge. The way you oppose fascists is by shutting them the fuck down, and if you’re against that, you’re doing nothing but aiding the enemy.