When Antifa and other communist anti-fascists talk about opposing facism the mean Nazis (aka alt-right, Far Right) and Anarchists.
When I talk, it’s about them. Communists believe in international socialism. Fascists believe in ethnic socialism. Only difference between Nazis and BLM is the identity of the “master race” that’s supposed to take everything away from the “undesirables,” and the identity of the “undesirables” from whom everything is supposed to be taken. But the formula is the same. X triumphs over Y and redistributes their wealth, kills them, enslaves them, whatever. Communists do it based on class and believe that class transcends national borders. Fascists do it based on race and believe that race must overrun national borders in their favor.