Pretty much ever novel he has done, ever. There was more than one you know.
More specifically, might sound something like this:
"Since the end of the period of belief, leaders exalt every defect, every kind of sadism, and gain all the more through their vices: vanity, ambition, war, death in a word."
Céline's anti-semetic streak was crystal sharp, and well known now. Beyond all that he was an equal opportunity satirist. He might fly with the more flexible alt-right crew, but his omni-satirical bent makes him too much an ambiguous degenerate for proper /pol/-tier quote mining; fair warning. I beg your pardon if that is not the case here, although it is an understandable assumption given where we are.
Someone should scan-and-post his Paris Review interview. Stalingrad was The End, in case you did not know. I would have loved to sit down to dinner with him to discuss literary theory. Then move on to history, after a few dozen beers. All on my own tab, and it would have been worth every penny.