It's a social problem that's largely been created by technical solutions. To put simply, radicalization is a lot easier when you give every loon with an axe to

It's a social problem that's largely been created by technical solutions. To put simply, radicalization is a lot easier when you give every loon with an axe to grind both a megaphone, and an echo chamber to invite new recruits into. Now, there are also problems with a world that doesn't give everyone access to 1:N broadcast media, but they are different problems.