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There’s no organization called “Antifa,” though. It’s just a concept. There’s organizations calling themselves “Black Lives Matter” but most of them are (or were) just trying to (a) organize or (b) get donations and do nothing. Both are just ideas meant to unite disparate groups.
It’s like saying there was an official organization called La Résistance in France during WWII. It’s distributed, small, independent groups with similar ideologies that got a name in retrospect. There’s no central organization.
I know the point of this is probably just intimidation but 35 companies? Are there 35 social networks that moderate content? Why is Apple included? Is there some conspiracy theory that they’re censoring conservative App Store reviews?