how do u fit 100 Jews in a Volkswagen? 4 in the seats and 96 in the ashtrays
This is a very anti-Semitic statement, no matter if it is meant as a joke or not.  These things should not be said
It's a joke, get over it
When someone makes a joke like this, they are trivializing the deaths of millions of people, some of whom could have been your friends' grandparents.  The way that this joke was worded suggests that the person telling it wants those kinds of massacres to continue in the present day, and that is simply unacceptable.