What kind of radicalization do you mean? The kind that tries to violently overthrow the government after an election they don't like?

The same leftist university students that brought Islamic revolution to Iran and cultural revolution to China. It all starts with universities. Today's protesting students from Columbia are tomorrow's political elite and mark my words, Germany's 30s will look like a walk in a park comparing to what will be in US.

And regarding your Idaho farmers and other nutters with horns on the head, they are too irrelevant and dumb to cause anything serious even in large numbers.

Yet people with lower education were (again) more likely to vote for the most radical president in the US history.

Social media and its propagandists are the source of modern radicalization, together with failure of neoliberalism to produce growth that benefits the little guy. The university far leftist radical and rural Trump voter have lots in common in hating the status quo. They just blame different things, often the wrong ones like migrants or white privilege.

Everyone not in the billionaire club should hate neoliberalism.