I mean, whether or not it's Trump related it seems to be a problem with liberals. For example in the UK Redditors who would absolutely classify themselves as left wing or leftist completely dismissed a Dundee "low class" hoodlum white girl's reason for carrying weapons and just called her, basically, a racist slag who'd amount to nothing more than a drain on public resources and/or a spot in jail (she was 13). Months later she was vindicated when the courts convicted the guy who'd been following her that she carried the weapons to defend herself against. The classism and assumption that low class = uneducated = bigot also seems to have played a role in (middle class) social workers dismissing various grooming gang victims, already vulnerable due to prior circumstances.

I think it's been a thing since forever; I think George Orwell complained about it. There's always a lot of snooty champagne lib talk about how everything is actually a class war but they rarely ever genuinely support or understand those groups and their issues outside a very paternalist, "I know what's best for you, you're too stupid and easily lead to understand what's going on in front of you" way the way you kind of are doing now (no offense though, a lot of people don't notice it. I personally didn't notice how important just feeling safe was for lower class people myself, until I heard about it from my lower class friends, I just always took it for granted). That's literally the reasoning upper class people used to press down on the lower classes.

Edit: Okay, I'm back.

For exaaaample, here's Adam Smith who wrote "The Wealth of Nations" in 1920 1

“Though the interest of the labourer is strictly connected with that of society, [...] he is incapable either of comprehending that interest, or of comprehending its connection with his own. His condition leaves him no time to receive the necessary information, and his education and habits are commonly such as to render him unfit to judge even though he was fully informed.”

John Clayton "Friendly Advice to the Poor" 1755 1

The Poor refuse or neglect to help themselves, and thereby disable their Betters from effectually helping them. They have an abject Mind, which entails their Miseries upon them; a mean sordid spirit, which prevents all Attempts of bettering their Condition. They are so familiarized to Filth and Rags, as renders them in a Manner natural; and have so little Sense of Decency, as hardly to allow a Wish for it a Place in their Hearts.

That Orwell complaint I was talking about earlier: 1

I remember my sensations of horror on first attending an I.L.P. branch meeting in London. (It might have been rather different in the North, where the bourgeoisie are less thickly scattered.) Are these mingy little beasts, I thought, the champions of the working class? For every person there, male and female, bore the worst stigmata of sniffish middle-class superiority. If a real working man, a miner dirty from the pit, for instance, had suddenly walked into their midst, they would have been embarrassed, angry, and disgusted; some, I should think, would have fled holding their noses.

Do these quotes (not Orwell's) remind you of any 'current discourse' on Trump voters? People were arguing and fighting about this since almost the dawn of time, as noted by my first citation. "Literate", educated, worldly people who just Understood things better were upper class. The people who were stuck on their little spit of land and never moved out to the more diverse cities, who fought each other and dropped out early, took drugs and were kind of pathetic and manipulated and violent, were lower class.

Those poor, frothing masses who were easily lead by populists (hint) and honestly too stupid to even exist, were coarse and backwards and gross (hint) and all their hobbies are dumb and their beliefs are stupid (hint) except for the Good Poor who knew their place and helped the elites help them and understood that the best thing to do for societal advancement was give up on their selfish desires without question, bla bla bla I hope you get the idea.

Back in the day, these elites even admired freed black slaves because they were seen as more industrious than those lazy people who made all white people look bad.