A lot of us on the right were slow to believe that the tobacco industry did a lot of science directed at making their product addictive. We were wrong on that point, because they did. Big tech has done a lot of science directed at making their product addictive too. Whether by design or not that addictive basket of products radicalizes people too. But like yourself unless you don't count CARM I don't have any social media presence either.The internet has been polarized for as long as I've been online (twenty+ years). I don't do twitter or any other social media (unless you count CARM). I'm not sure what you mean by twitter radicalizing the net. Despite its popularity, I don't think it can radicalize anything but itself.