The "colonizer" rhetoric is just part of it, but it's more so as a piece of the puzzle that shows of an overall change in how we perceive ourselves and how we report on things in the public sphere.
It's unquestionable that ostentatious displays of wealth are met with revulsion and derision, therefore we don't show those displays. The downstream impact is that the masses have nothing to aspire to or look up to in this specific context of craftsmanship. Again, when was the last time "you" wore a suit? Was it tailored? Do you only wear it at weddings? Do you buy your clothing from Costco/Kirkland? Do you find yourself in the fast food line at Chik-fil-a or driving across town to Buc-ee's in your Jeep? These kinds of consumerist behaviors are good and accepted. If you tell someone you only eat at tasting menus or high end restaurants or something instead of those being celebrated as good you'll be met with incredulity or even be made fun of "you're so fancy" "ugh if only I could afford that", and then it devolves into mass-market "experiences" and so forth. (As you read the rest of this post remember that I'm critiquing capitalism here as well).
Because Wimbledon is ongoing and the ladies championship was today, how many complain about the players being required to wear all-white? How many have complained once the champion's dance was re-established? Do you think it's silly or stupid? You're part of the problem! It's considered classism - but without it, you get sterilization. Reduction to the lowest common denominator.
In general, leftist ideologies, so think communism and other sympathies, result in minimalist architecture and decor and art, because grand displays of wealth or even the concept of "rank" with respect to members of society evoke royalty, "white European male", and "let them eat cake". To flaunt your wealth or aspire to be part of a country club or to invent new social organizations and elite activities is to be on the receiving end of the social hammer. You can't have nice stuff because that goes against the doctrine. I'm painting in broad strokes here, but I think this is accurate. It's no accident that all of the best buildings were built under royalist regimes, monarchies, and more.
And because of the disgust and vitriol and crabs pulling other crabs down as they try to escape the bucket, now we are just left with wealthy losers who have forgotten their noblesse oblige.
> That discourse isn't even particularly dominant amongst the left (often clowned as "third-worldist", reductionist or class denialism).
I think this is just flatly false. You've probably just seen it so much and it has become so common to you that you've become less sensitive to it. Leftists in particular are very in-tune with class warfare. I saw a bumper sticker the other day that said, and I'm paraphrasing, culture wars are a distraction from the real war, class war. I see stuff like this all the time: https://www.amazon.com/American-Magnet-War-Class-Text/dp/B09... .