Nationalism/Statism Thought?

While reading the Grapes of Wrath, I noticed that the term “Okies” is often used as a derogatory term by the California natives to refer to the migrant workers from Oklahoma. While I feel that this is more of class charged comment, (well off, bought off Californians talking down to poor migrant Okies,) it is interesting to note that these two groups of people are much more similar to each other vs lets say New Englanders. More-so Classism then racism. Another angle is that we as a human race are growing more and more connected and alike during the 21 century. While in the 1930’s Californians were racist towards Okies, (and at the same time Germans to Poles, Japanese to Chinese,) now in the 2020’s I’d say that 98% of the US populace isn’t racist at all. (Not counting 1% of the crazy goons on either side of the political spectrum,) Is that because of the lessons from history that we have learned as a people, or because of the interconnectedness of the globe today? Kids today are born and by age 5 or 6 are enrolled in schools that thankfully aren’t organized by race or gender. Kids today just aren’t taught to be racist, which I think is a very good, large step in the right direction for our society. (Big tangent there)