Antifa is a loosely organized group of like minded individuals. There is no official membership, it's an ideology welcome to any who share this world view. They develop tactics to intimidate and silence their opponents and help each other cover illegal and immoral behavior. This can be hitting people in the head with bike locks, throwing cups full of cement, lighting buildings on fire, and other destructive behavior. They wear black bloc and cover their faces so as not to be easily identifiable. They claim to be the good guys "fighting Nazis", but really they're a bunch of thuggish larpers with social behavior conditions and a lack of morals. I have hours and hours of video footage of Antifa individuals perpetrating violent and destructive acts against those they disagree with. They lean heavily into the untrue sentiment that they aren't an organization as it allows them to side step any kind of legal accountability. In reality they operate sort of like sleeper cells in different regions protesting, rioting, stoking the flames to silence their political opponents. They're scum.