All of communism but the word itself
is being promoted.
Joe McCarthy argued that even if one wasn't a card-carrying communist, it didn't matter, as he saw communism as a way of life and a way of thinking. To him and many others, communists were like heretics - an evil menace that had to be eradicated. Calling people "communists" is a political tactic. Always has been. It may not carry the same weight as it once did, but there are still some factions in America who use red-baiting, such as those who call Biden and his administration "communists."
Other than NK I think every country has some
degree of socialist / socialist system.
I had not noted nationalism as a main topic
from you. But sure, nationalism in combo with
any other - ism can be bad news
I look at it in terms of cause and effect. Historically, the rise in nationalism took place at the same time as the classic liberal economists, coupled with the rise of industrialism. One can discern the historical relationships and how they affected each other. I would suggest that there could be similar patterns in what exists in today's world, particularly with the noticeable rise of nationalism in multiple countries.
Nations are not unlike businesses, and historically, they tend to compete with each other just like rival businesses. But they don't always play nice, and one of the results has been world wars. I think those wars were so devastating that it gave some people pause, and it fed the desire for greater international cooperation, peaceful conduct between nations, human rights, as well as enhanced social programs, workers rights, civil rights, and a more benevolent system of government. That was seen as the key to avoiding any kind of extremist government.
Unfortunately, the world has wavered from those ideals. Maybe there's not enough resources, too many people, and the only thing left to do is to fight over what's left. At least that's what the U.S. government has been worried about, with all these rogue nations and belligerent powers to contend with.