Itās being empathetic toward their ancestors. Knowing what they went through, and suffered, will obviously cause pain and make them angry. You give the example of black slavery, the idea of being enslaved and literally being killed and discriminated because of your skin colour, because they werenāt āprecious whiteā it is disgusting. They talk about it, they fight about it, they raise issues about it, because even though itās not as extreme as it was then, itās still happening now. The repurcussions of those times are still having an effect now. People just turn a blind eye to it, because itās the 2018, it canāt happen in this day and age.