The first problem is when people try to treat antifa as an organization rather than as a loose ideology that is supported by groups across a wide spectrum, and then tries to use that to assign guilt by correlation.
E.g. the original antifa was set up by the KPD (pre-war German communist party), but many modern antifa groups use logos that incorporates symbols that were used by the SPD to explicitly attack the KPD and Hitler (and Papen; who eventually demonstrated how dangerous he was by being the person who brought Hitler to power) who they saw as just as authoritarian as Hitler (with good reason - KPD were Stalinists). E.g. you might recognise the 3 arrows from this poster [1].
You'll find antifa groups coming out of groups with political ideologies that are close to mortal enemies. The only things they have in common is opposition to fascism and some general symbolism.
E.g. the original antifa was set up by the KPD (pre-war German communist party), but many modern antifa groups use logos that incorporates symbols that were used by the SPD to explicitly attack the KPD and Hitler (and Papen; who eventually demonstrated how dangerous he was by being the person who brought Hitler to power) who they saw as just as authoritarian as Hitler (with good reason - KPD were Stalinists). E.g. you might recognise the 3 arrows from this poster [1].
You'll find antifa groups coming out of groups with political ideologies that are close to mortal enemies. The only things they have in common is opposition to fascism and some general symbolism.
[1] https://antifacwb.files.wordpress.com/2009/05/ka003265.jpg?w...