For more perspective, throw in the Turkish genocide of the Armenians (where a British journalist first used the word "holocaust" in its modern sense-- the journalist was Winston Churchill) and the Holodomor. And to diversify more, there's Pol Pot's auto-genocide in Cambodia and the Rwanda bloodbath. Maybe also a sideshow on the Serbian aggression against everyone nearby who isn't a Serb.

No, silly, you have to show the side where the Jews made the Nazis feel bad for gassing them /s

We'll have to add a bunch of literal Nazi propaganda. And not as examples of vile hatred, but presented seriously as an argument to "both sides" the Holocaust.