Had a bit of a revelation

I realised (in the shower albeit with no shout of eureka) that the reason the holocaust is condemned uniquely among the vast array of western atrocities is because the holocaust is pretty much the sole incident where the abhorrence occurred without a profit motive, the final solution to the Jewish problem was an ideologically pure act.

In short it was a crime against capitalism and thus intolerable for the elite and perfectly acceptable for the general population to know about it and think it terrible. Had the victims of the holocaust merely been worked to death as slaves the condemnation would be much milder; note how little mainstream condemnation there is for major collaborators such as hugo boss, Coca Cola and IBM (without whose custom designed and directly operated Hollerith tabulators the holocaust would've been logistically impossible) because they aided evil for profit.