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What would have happened if the SS men refuse to carry out the Final Solution as too barbaric for a superior race to even consider? It's one thing to be an anti-Semite. It's something far different to actually go out and kill the undesirables in mass murder.

Perhaps some people would have considered sterilizing them or putting them in ordinary work camps (though who would feed them)?

Sure, they could have been replaced by people who would execute the undesirables, but if a lot of them rebel (or worse still spill the beans to the German populace)...
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