Antifascism and anticapitalism are necessarily violent. You can't resist nazis without punching them back. You can't stop capitalism without expropriating the expropriators.
No, they are not. That wont stop an enlightened anarchist or antifascist from insisting that they are, and lying about this to as a pretext for their violence.
as fascism and capitalism are just labels you can put on anybody you like (as this is just a subjective opinion), you have a cheap excuse to harm everybody with violence as you like.