According to Louis Fischer's Gandhi and Stalin, Gandhi's view was that the German Jews ought to commit collective suicide, which "would have aroused the world and the people of Germany to Hitler's violence." After the war he justified himself: the Jews had been killed anyway, and might as well have died significantly.

I like the Quakers, but I'm not yet convinced about pacifism. [To paraphrase a certain advert that irks me just now, I'm not ready for pacifism yet] I guess it's true, that if you are not prepared to take life, you must often be prepared for lives to be lost in some other way.  Gandhi seems to have accepted this – can I?