Makes light of their crimes & garbage behavior either using preexisting jokes, stereotypes, or evidence to the aforementioned, rendering their criminal behavior as nothing more than humorous claims. It's like when Taco Bell employed a 'Belluminati' campaign off the growing humor (rather mockery) of either that faction or freemasonry shoring up on public consciousness, rendering it "meaningless" to the average person.

1. shekels

2. What Islandpass said, they can disarm public opinion Jewish crimes as "just silly jokes" and thus make it harder for people to take people actually talking about Jewish crimes seriously. Whenever you see what looks like a Jew making fun of Judaism, ask yourself if Jews are actually the butt of the joke, or if the real butt of the joke is "antisemitic" goyim, see: Borat's (a.k.a. sacha baron (((cohen's)))) "throw the Jew down the well" song, it's actually kind of catchy song that makes fun of Jews but only in "safe" ways (jew's have horns and like money), while the white people laughing are the actual butt of the joke.