ANTIFA is very organized. Their leaders remain hidden for obvious reasons.
Perú, for many years, had the exact same ANTIFA/BLM arrangement, i.e. Sendero Luminoso/Tupac Amaru. Both were "domestic terrorist" organizations that promted Peruvians to elect Fujimori simply on the platform of promising to put an end to all the terror.
ANTIFA and Sendero Luminoso are Marxist Anarchist organizations whose leaders don't dare show their faces lest they face the death penalty. They are not socialists.
BLM and Tupac Amaru are Marxist causes rallying around a selected victim group. They lean socialist. Their concern for said victim group ends with the name of the organization as only a small percentage of the organization is of the celebrated victim group, however the socialist cause requires all members to virtue-signal the victimhood of the group as the doctrine that unites the members under the cause.
These organizations have been around for centuries and did not somehow recently "form spontaneously" in the US. Organizations such as these are always ready to spring into existence with funding and logistics support whenever certain political environmental factors are right. As my signature states, they ALWAYS wear the disguise of being brand new to make the members feel like it's THEIR cause ... and so they don't realize that they are being used by much bigger powers who care nothing for them and who will discard them when convenient.
Hitler's ANTIFA were the brown shirts. He used them to propel him into power, even though he hated them, he never trusted them and disposed of them when first feasible.
ANTIFA is not new, is not an idea and is definitely very organized.