Disclosure: I spent a bunch of time in 2016 and 2017 reporting European hate groups and pages for violations of TOS. Video montages that recycled unrelated footage for misinformation about the immigrant crisis (for fear-mongering purposes) weren't enough to achieve a takedown, but gradually most of them progressed far enough in their rhetoric, to objectively deserve removal (Look up European identity movements).
Downvoters: I'm also talking about private Fb groups where assaults on asylums were organized.