Hi Joe
What would your statute of limitations be? Are we allowed to trivialise, Roman Gladiators (Killing Christians), how about the Crusades (killing Muslims), The American Pioneers (Killing Native Americans). Very few would argue that the Holocaust was anything but dreadful but there are loads of examples if it being the subject of fun eg. Allo Allo, The produces (A Mel Brooks production) History of the World part I (Mel Brooks again)
A Jew (Mr. brooks)wrote the immortal lines
"Don't be stupid be a smarty
come and join the Nazi party"
followed by an extravagant song and dance routine, now that's trivial!!
Harry is a dimwit but in fairness he was born in 1984, this is ancient history to him. Send him to Sandhurst post haste that'll make a man of him (ahemm)