Extremism online and on the ground.
Last weekend's riot and murder in Charlottesville, Virginia, when neo-Nazi-led marchers brawled with Antifa counter-protesters, resulted in one death and several injuries when a neo-nazi sympathizer rammed his car into a crowd (New York Times). These were followed by a jihadist car-ramming in Spain. In both cases online chatter inspired fighters.
The center of neo-nazi inspiration in the US is held to be the Daily Stormer, an online publication evidently inspired by Nazi Germany's Stürmer, a newspaper vile enough to earn its publisher a death sentence at the Nuremberg Tribunal in 1946. The Stormer has been ejected from essentially all of the legitimate sites that had hosted or provided services for it; it's currently existing in a Tor half world, and only intermittently there (HackRead). Private companies are generally thought by legal experts to be within their rights to refuse to do business with "non-protected classes," which would include most political groups (Ars Technica).
Even Cloudfare, among industry's most principled free-speech advocates, booted the Stormer after the publication claimed Cloudflare was in sympathy with its views (decidedly not the case) (WIRED). But Cloudflare's CEO remains uneasy about the control companies can exert over speech. He's called for industry to think through how it should handle extremist content (TechCrunch).
Online vigilantes (encouraged by some celebrities who have themselves been victims of doxing, and whom one would think might know better) have doxed people they think they see in pictures of the neo-nazi marchers. Foreseeably, many of those doxed are entirely innocent and uninvolved (WIRED).
The jihadists in Spain were members of a network Catalan police swiftly rounded up (mostly killed). The principal attacker retrospectively looks like a known wolf; the cell he belonged to participated in the now sadly familiar forms of jihadist inspiration (Times).
In an unrelated action, Saudi authorities are indicting "radical" Twitter users, essentially ultra-Wahhabi extremists (CNN).