Reddit is the best example of that. I don't want to defend him but look at every single news and politics related sub from /r/news, /r/worldnews, /r/politics etc.
But that happens here too. Honestly I blame the upvote downvote system more. Reddit and HN are both really wrong with it
> Media Matters for America pointed out posts where r/The_Donald members fantasized about or encouraged violence related to Oregon’s recent climate change vote where Republican lawmakers fled the state Senate to prevent a climate change bill from passing, one of them even implying that he would respond to any police action with violence. r/The_Donald members posted comments like “none of this gets fixed without people picking up rifles” and “[I have] no problems shooting a cop trying to strip rights from Citizens.” The posts were later removed.
Various other bits of misbehavior ensued: https://en.wikipedia.org/wiki/R/The_Donald#Quarantine,_restr...
> In November 2019, the subreddit's moderators attempted to evade Reddit's imposed quarantine by reviving and promoting a subreddit called r/Mr_Trump. This subreddit was banned by Reddit's administrators in accordance with its policy that "attempting to evade bans or other restrictions imposed on communities is not allowed on Reddit." Days later, Reddit's admins warned the subreddit's moderators about trying to out the alleged White House whistleblower in the Trump–Ukraine scandal in violation of Reddit's rules on harassment and inviting vigilantism.
and Reddit bans the left-wing equivalents for similar actions: https://www.nytimes.com/2020/02/29/us/politics/bernie-sander...
> Over the summer, the “Chapo Trap House” message board, which has nearly 153,000 members who chat about the news and memes of the day, was censured by Reddit, which hosts it. The page now has limited reach and is in a sort of digital purgatory, where it remains.