What's the modern history worth teaching about it? You don't teach everything in schools. Going through primary school between 2000-08 and high school between 2008-2012, not once did I get taught about school shootings, serial killers, terrorist attacks etc. It's not stuff you need to teach. It serves no benefit. There is so much you can take from history that is actually worth teaching, and so much that is best left in the past as an embarrassing part of humanity. Parts about racism/sexism that we were taught were always about how bad it is, how it's offensive, stories about how so many people were oppressed, deprived of whatever, etc. In what category does showing an insulting cartoon fall under? How does some guys cartoon that was meant to offend constitute as any sort of teaching material? I'm genuinely curious what teaching value you think can arise from it. Because what I see is a lesson saying "say what you want, however you want, to whoever you want, regardless of if you're being respectful, tolerant or not. That way of living is guaranteed to lead to many quick beatings and not many friends. There's no positive there. You don't play the racist songs in class when teaching about slavery in the USA and racism. There's way to teach everything without being straight up disrespectful or showing the media that is disrespectful to a large amount of people.