ANTIFA are anarcho-communist, which is not at all the same thing as anarchist. Anarchists advocate for an absolutist "no government system whatsoever" form of society.

Anarcho-communism is a ploy whereby a socialist [utopian] form of govt. is promised to be created after an anarchist state is achieved. The alleged necessary purpose for first creating an anarchist state is to economically "equalize" the population- through anarchy, and chaos, before ushering in a socialist/marxist utopia as, promised by those [movement leaders] who first promote the state of anarchy.

Basically, anarcho-communism is just communist usurpation of an existing govt. (through anarchy) while promising a socialist utopia to "useful idiot" dimwits who fall for the socialist utopia schtick.

"We will build back better, comrades! But first, we need for you to destroy everything!