Lately I've recalled this passage from the Puritan epic Paradise lost. I'm far from the first to notice the hereditary link between Puritanism and modern SJW culture, but it is interesting to see their core belief that moral impurity cancels out all merits articulated so long ago, even using the word "Cancelled" in exactly the same way as modern cancel culture. The angel Raphael is telling Adam about the war in Heaven, recounts the deeds of the various angels, and concludes with this passage:
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The difference that makes SJWs so insufferable about it is that in their worldview truth and justice is defined by whatever the current academic consensus is, while with the Puritans it came from divine revelation so they didn't change the rules all the time.
Edit: Someone mentioned the Blank Slate, this matches well with their whole "Society is God" assumption. Paradise Lost and other Christian works assert that the strength of all beings is determined by God. Since SJWs have swapped out "God" for "Society" they believe their social programs have the power, or will have it once sufficiently refined, to elevate the most pitiable people to the highest levels of power and competence. They love representation because it shows that their programs are working.. even if it's mostly through smoke and mirrors. So anyone can be replaced in the just society, the weakest man can outdo the strongest if he has
God the managerial state on his side, thus moral virtue as defined by Current Year is the only quality that really matters.