Skin color is the least significant biological difference between the races. The far more significant differentiator is PSYCHOLOGICAL. Different races have dramatically different hardware in their brains, which leads to different types of cultures and societies being built by those people. For this reason among many others, #Multiculturalism will never work. It will ALWAYS end in conflict, as different racial tribes with different genetic wiring will always want different things, and prefer different social structures that support their cultural desires. #Nationalism is about giving all of these different groups their own sovereign nations where they can live peacefully amongst their own kind, and pursue their tribal destiny together without the constant stress of needing to fight clashing values or demographic dilution from foreign outsiders. It's the clear best path forward for all parties involved.