Anti fascist => anti dictatorship.
Anti fascist means that you don't like fascism and that you are not going to let it happen passively.
(Tired of explaining the obvious. But I guess that somebody has to.)
A dictatorship mechanically leads to a situation where the governing group is working for their own wealth, thus in this case the "group" is the governing class. The extent and definition of that class is voluntarily limited so that wealth and power converges to them.
Now you see it? Yes that is a fascism, meaning that:
dictatorship => fascism
And the reverse stems from the "groupism" (i.e. tribalism) of fascism, which entails that you need exclude large portions of the population from the political system.
As this "group" definition becomes narrower and narrower (in order to make more wealth converge to the alleged "true humans" of its center), it becomes a harsher and harsher dictatorship, and finally a strongman regime.
fascism => dictatorship
"Antifa" factions in the Spanish Civil War ultimately did not win and accidentally enable a Spanish DPRK, but they still were perfectly capable of being and doing evil, such as committing mass rape and shooting of nuns.
If somebody says something nice and does nothing, that's good.
If at the same time somebody does something bad, that's bad.
That does not remove the evaluation (nice or bad) of the speech alone.
Saying "I am against this thing that is objectively despicable" is GOOD.
So, saying to be anti fascist is good.
Saying to be anti fascist and doing fascist things is bad.
I don't know how much more obvious things I am supposed to explain...
I guess there is no limit to it.
Anti-fascists are not concerned with the magical weight of this in-group designation. They are concerned with all things non-fascist.
You are probably thinking about the Communist factions among the Republican forces opposed to Franco.
ALL of the Republican factions were opposed to Franco and to fascism, not only the Communists.
And, besides, nobody was calling themselves "antifa" at that time, because that was damn obvious that if you were in the Resistance, you were opposed to that despicable tyrant. But they were absolutely anti fascists, all of them and not only the Communists.
And seeing slop where there is not, you are being rude to me without purpose.
Not everybody is born in an English-speaking country.
I laid down the ideas logically, maybe that is what sounded foreign to you.
By the way you are the person writing nonsensical stuff such as "Antifa is a terrorist organization", while everybody is repeating tirelessly that it is just an adjective meaning to be opposed to fascism: