Isn't it remarkable that evil strikes us as ridiculous? That the concept of 'evil' seems dumb or insane or manipulative - that to believe in the reality of 'evil' is itself seen as the product of a deranged mind?
One of the ways that evil is disposed of is that it is regarded as a kind of conspiracy theory, and we all know that conspiracies don't exist...
The two options presented by mainstream discourse are 'cock-up or conspiracy' - accidental and blameless error versus self-aware, purposive, explicit alliances to pursue what are acknowledged to be deliberately harmful plans.
Actually, these two options do not exhaust potential descriptions of reality...
Evil is absent from modern discourse, because the modern concept of evil is a straw man - and also because in a nihilist world there is no such thing as evil.
Similarly to conspiracy, for something or some-one to count as evil they are supposed to be self-aware concerning their own evil nature, and to pursue evil wholly and relentlessly in all things.
If it can be shown that evil people or groups are well-motivated, or sometimes do good things, then that evidence is assumed to have disproved or explained-away the evil.
How did we reach such a state of absurdity? Especially after living-through the twentieth century, with evil operative on an unmatched scale?
Answer: Because we live in a society where the Left has won. And the Left has a problem with evil, a deep and insoluble problem.
The Left cannot conceptualize evil (because it has no coherent concept of The Good). Even in its own terms of materialistic, this-worldly hedonism - in terms of a society optimizing comfort and pleasure and minimizing suffering, the Left cannot deal with evil - at root, because so much misery on such a vast scale has been deliberately produced by Leftist schemes and regimes
For the Left to have a concept of evil would be to convict themselves.
Leftist evil (and evil by Leftist standards of moral evaluation - truly vast quantities of human misery) - evil which is so very extreme and so very obvious - simply cannot be acknowledged nor responded-to.
You would have thought that so many and such extreme examples of the consequences of Leftism would have destroyed the Left - but no; the Left is stronger than ever.
The conclusion is that no evil which could ever happen could ever destroy Leftism.
And since we all live in a Leftist society so pervasive that we are all tainted by Leftism to a greater or lesser degree - we can only glimpse the truth at moments before relapsing into delusional dreams.
We all have a problem with evil, a blind-spot about evil.
And the simpler and clearer and more obvious the evil, the less clearly we can understand or see it, the more necessary it is that we do not see it.