Argumentum Vastati Amber

Thanks to the currents events from Johnny and a crazy bitch, we got an interesting fallacy. Argumentum Vastati Amber is when somebody did something horrible, but that person tries to demolish others by telling them all their flaws and how others aren't as good as they seem. Unlike Ad hominem, Argumentum Vastati Amber is exclusive when some one tries to reduce reputation damage by trashing out others, though the things aren't as bad as the protagonist did.

Jack: Yes, I did fuck your sister Katie, but you were flirting last weak with a random guy and that doesn't give the right to whining me. Just deal with it.
Jack used an Argumentum Vastati Amber