Europeans killed a few other Europeans in the 20th century (and before it!). The base cause of it is chauvinism. It's mostly gone in the EU thanks to post-WWII

Europeans killed a few other Europeans in the 20th century (and before it!). The base cause of it is chauvinism. It's mostly gone in the EU thanks to post-WWII integration. CJK haven't had their "Asian Union" moment yet.