> See the “Bernie Bros” who flipped into full Trumpists a few short months later in 2016. I’m sure if you look back at the Spanish Civil War and other divisive historical time periods you’ll find plenty of turncoats that flip from one extreme to another.

This seems like a bit of a myopic, low-dimensional view of the political landscape. Bernie and trump (esp candidate trump) weren't "opposite extremes" when it came to plenty of issues: anti-free trade, anti-corporatist, promises to protect entitlements, complaining about the corruption of the existing political order, even just the populist vs technocrat aesthetic.

For people who prioritize this issue, the notion that Bernie and Trump are "opposite extremes" in every way relative to Hillary is laughable.

(President trump obviously reneged on much of his promises as a candidate and went with many mainstream gop policies, but that's neither here not there when discussing support during the election)

Bernie and Trump were also both anti-war during the preliminaries, each for different reasons. I prefer Bernie's reason of defunding the military in order to put the money into more social benefiting areas, but Trump goal on focus more on internal US interests could have some of the same effects.

The outcome naturally has a lot to desire.

Yup. The idea that there's a single axis along which Bernie and trump is an incredibly simple-minded view of the world. Unfortunately, most voters are pretty simple-minded, which tells you a lot about why politics is the way it is.

"See the 'Bernie Bros' who flipped into full Trumpists ..."

There really aren't very many of those people.