I do think many elitists live in a bubble and so think those who don't agree with them are stupid, when in reality two voters can have very different self- interests. Using globalism as an example, if your job is not threatened by illegal immigration or outsourcing of American jobs, you might love the lower cost of goods and services that all this competition produces on the price of goods and services.
If you are a short order cook in a restaurant where the owner just laid you off to hire an illegal immigrant who works for 25% less, you might feel very differently. Neither party is "irrational", they simply have different self-interests.
My wife and I operate a property services business, and we employ many first- and second-generation immigrants, who dominate "the trades" in southern California, it was no surprise to me that Hispanics more than any other racial group opposed open borders.
Likewise, it is no surprise to me that American technology workers are unhappy with the H-1B program and how it is being used to undercut worker salaries.
So, I would not say being elitist is bad, it is likely a "mark of success". Even better are elitists that feel thankful for how blessed they are.
I would say not seeing the "point of view" of those less fortunate is sad and dismissing those other people as dumb, garbage, deplorable, or a host of other derogatory terms reflects more on the character of the accuser than the targets of their comments.
Side note:
Interestingly more and more research into the human brain is suggesting that people can behave randomly or rationally, but not irrationally. The brain tries to behave rationally when it can (what we label as irrational behavior is often rationale behavior not consistent with what we would do). In other instances, a person has too little information to make a "rational decision", when that occurs the brains makes a random decision from the choices that are "good enough".
A simple example, when you go to the grocery store to buy apples. Do you go through every apple and choose the best ones. Or do you pick apples that are good enough at random? Without the random "good enough" ability of the brain, we would be stuck for hours trying to make decisions where the marginal improvement of the decision did not justify the additional time.