I'd be very interested to have a look if you don't mind telling what exactly you are reading. He called Judeo-Xtian morality a "slave revolt" or something like that in the Genealogy of Morals because he considered it a moral system that deadens rather than promotes life, so it's not the same domain as talking about revolutionary slave revolts. And really not sure about what you mean by charitable works. I'd say even from an orthodox Marxist perspective charity does not fix inequality because it treats symptoms of poverty and not their root causes.