Really? People get radicalised on the American social media all the time. Then go shoot people, all the time. Numerous shootings were organised on 4Chan&similar. What did your radicalised ones did may I ask? I hope it's more than having the "wrong" opinions on hot topics.
Can we please stop admiring China, Russia, DPRK and other similar countries where having the "wrong opinions" is considered radicalisation?
If those wrong opinions are actively harmful to others and/or lead to policy decisions that are actively harmful to others, then maybe "radicalized" still isn't the appropriate term, but I hope we can agree it's a bad outcome.
Can we please stop admiring China, Russia, DPRK and other similar countries where having the "wrong opinions" is considered radicalisation?