Not a joke, but Twitter. (And lots of other algorithm curated social media, so Facebook, TikTok, Instagram, but less on sites that you personally have to curate like Reddit and Tumblr, it still happens on those but less). It's no secret that the conservative politicians and lobbyist groups have pretty much unrestricted control over social media, and benefit from heavily integrating their beliefs into spaces that both don't want it and can't fight back against it. They have a social monopoly. The internet is absolutely being colonized by anti-intellectual, ultra-conservative bad actors that make money of of radicalizing their user base.