[JakeTheAndroid]

Just devils advocate here, but could it be you're the minority of that demographic?

I'm libertarian, and vote all over the map, but likely lean more liberal. I know plenty of well educated, employed conservatives. But, a bulk of voters in Trump's corner are not you. It's like going to a Free Speech rally. Some people are likely there just for speech, but if Neo-Nazis show up, and cause a ruckus, they're the face of the movement. Same goes for Antifa and taking over other peaceful protests. So, I think the disenfranchised, middle of the country, uneducated, unemployed person is simply the face of the cause. Unfortunately, some people only see things at face value.

[schoen]

Maybe the phenomenon you describe would be weaker in U.S. politics if there were more political parties and less incentive for people to vote major-party. As it is, it seems like a lot of political journalism consists of different attempts at tea-leaf reading about which demographics were motivated to join which coalitions how, and whether the coalitions will shift, and how we would even know. I'm sure those phenomena also occur in other countries with a broader partisan landscape, but maybe they come with a smaller dose of speculation. :-)

[wasted_intel]

This unfortunately doesn't work well in a "first past the post" voting system, as a more general party will typically overpower a split opposition.

[schoen]

That's definitely a main factor that's tended to reduce the appeal of third parties.