Facebook CEO Mark Zuckerberg testifying before Congress in April 2018. It wasn't his only appearance in DC this decade.

“A total of 113 white supremacist organizations and groups had a presence on Facebook, sometimes more than one. One user-generated page that has been active for over a decade had 42,000 likes. Ten other pages and one group had more than 1,000 likes each.Much of Facebook’s moderation system relies on artificial intelligence to flag potential violations for human moderators, a system that appears to be easily thwarted. Simple misspellings of words—whether by adding vowels or using $ in place of S, for example—have been enough to foil algorithmic moderation.”

Source : Facebook has been autogenerating pages for white supremacists | Ars Technica