Huh, I went to school in the 90s and it was much the same, if not worse. We learned about the slave trade in pretty basic terms, mostly about Canada's role as a sanctuary for runaway slaves, ok fair enough. We were also taught that the entirety of WW2 was a race war started by Hitler (I don't think Japan or the Pacific theater was mentioned once) and spent literally 75% or more of our Social Studies classes talking about how fucking great Native Americans were before whites came over and ruined their utopia by getting them all sick (they never even really admitted that Natives got genocided and certainly never said a word about residential schools, what cultural genocide even is, or the legal status and allowances made for Natives now and how that's affected their living conditions on and off reservations).White guilt comes from a couple of sources, but a lot of it comes from the schooling in the 2000s when every class would at one point study the slave trade and other bad things that white people did to black people, and the whole thing was effectively several months of hearing that white people from then were some of the most evil people imaginable and white people today still benefit from this. I know that sounds exaggerated, but in my experience it's an accurate description. After hearing that, it's pretty easy to feel bad about being white.
They spent far more time trying to hammer "acceptance" and "diversity" and "everyone is valid" and "stereotypes are bad" into everyone than actually teaching us anything that was factually true. Most of the white guilt was hammered into us by giving us comically outdated pictures of how people live in Africa and Asia and how easy we have it compared to those poor backwards coloreds, and we should be thankful, goddamnit. One time when the teacher told us how we should all feel guilty for how our ancestors treated blacks and Native Americans I raised my hand and asked if I still had to feel guilty if my ancestors were plague-ridden peasants digging up potatoes for the Tsar, I was promptly kicked out of the classroom and never got an answer.
So yeah indoctrinating children to feel white guilt and history/social studies classes being absolutely fucking abysmal is definitely a thing that happens. A few more generations of this and whites will be falling over themselves to pay slavery reparations