JDelekto: I'd like to think that new people in this world aren't exposed to the past prejudices and biases that our parents had already gone through and made an attempt to reconcile.
However, the sentiment lingers and there are times where said biases
renew when people see patterns emerge
once again.
Of course they are not. Otherwise most people would still live within the systemic confines of lets say political systems such as feudalism or "direct fascism" (compared to only seeing implications of fascism in modern times, read James Gregor), which are systems that became replaced as time went by.
Definitions of symptoms of systemic issues such as white supremacy also changed a little bit (the same way you can't directly compare the political landscape of 1919 to 2019 without acknowleding the general flow and change of information between those times given the both have unique historical contexts that you must consider) because thats what the flow of information actually does, it slightly changes definitions throughout the evolutionary flow of history so it can fit within the confines of the zeitgeist through that specific time.
Which means that these "patterns" as you call them are juxtapositions of what people think they
were. Its kinda like comparing ancient pottery to modern pottery. It may still be just a damn vase, but the quality between the two (and when they were made) is what matters and what you would rather choose to use will largely depend on the comparative qualities of the modern vase. And like comparing the two vases, fringe ideologies will wither and ultimately cease to exist, because just the vases themselves political ideologies don't exist to care about history itself. So at some points in time, the modern vase will simply vanish/change out from the public concious into a new zeitgeist and thus become ancient and outdated until people make another, newer vase that fit better within the new situation and the public eye.
Well at any case, I hope that the analogy does make a little sense as that stuff is quite complicated and my vase allegory is a little bit too vague. But if you really didn't get a word of what I was writing I implore you to read Fukuyamas "The End of History and the Last Man" (or read a summary or something) which probably the single most important book for people who're reading this thread right now.