I have seen this claim made before, but never substantiated. While I find it extremely unlikely that the U.S. and Britain did not know about the death camps early in the war, the notion that they avoided bombing them as part of some sort of strategy favoring complicity in murdering Jews is outrageous and slander of the worst sort, unless it is backed up by some hard facts.
Do you know of or have any links to sources that provide some factual basis for this claim? Please post if you do.
Todah rabah.
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