Basically there are two MAJOR things that jews don't do:
1. They always bury their dead, they never cremate.
2. They NEVER get tatoos on their body EVER EVER EVER.
So on top of being one of the greatest atrocities in recent history, the holocaust was the ultimate "fuck you" to the jews. First you make them get a number tattooed on their body, and then you burn them to ash.
Never knew that before
