It is called "HITLER = SS" (a joke on the 1968 "CRS = SS" rallying cry) and it was a collection of Holocaust-themed cartoons by French cartoonist Vuillemin.
I have the book; it is indeed in appalling taste, but in very twisted way, funny through shock and excess.
It came out about ten years ago or so; I believe it may have been the subjects of some (understandable) attacks from concentration camps victims & relatives, but ultimately prevailed.
Vuillemin went on to win awards, etc.
It is still on sale today. I can't possibly imagine anyone publishing it in the US, though it would be legally safe undoubtedly.
In this case, I will gladly say that in France you can really support racism using sarcasm and that there is no problem...But I must point that there would still be a difference: you would not see any major newspaper printing it.
A pleasure I therefore claim to show, not how men think in myths, but how myths operate in men's minds without their being aware of the fact. Levi-Strauss, Claude
