To what can you compare a dumpsterfire? The Holocaust: it created a lot of chaos and hurt people. But at least it got rid of some trash!
Why do you think that a trash fire is similar to the Holocaust, which killed millions of people?
It's what they have in common: trash
Telling jokes about the Holocaust is insensitive to people whose grandparents might have died as a result.  These are people who have never done anything to deserve their treatment, or your disrespect, and implying that all Jewish people are trash will just cause yourself to become an outcast.