I've found the concept of ethnic pride to be a very dangerous concept. Not universally dangerous. Many people hold it and yet exhibit no animosity or bias towards others. However, one look around the conflicts around the world and we can see that beyond the struggle for resources ethnic conflict and ethnonationalism is the primary driving force behind conflict. I've come the conclusion that moving beyond ethnic identity will be the only way human beings can ever overcome these conflicts. I also understand my point of view is most likely an idealized pipe dream.
I don't know Gnomon, with our new global economy, and people traveling and mixing, we may one day have not enough significant differences to call ethnicities. Everyone would speak the same language, dress about the same, eat similar food, watch the same movies, read the same books, view things the same way. I for one will be sad when that happens, but I see it as a real possibility.
Yes, I recognize that there has been ethnic violence. A lot of it. There's a lot of religious violence and people want to do away with religion. There's a lot of international violence and people want to do away with nations. There's a lot of sports-based violence, and I bet there are some people who want to do away with sports.
The thing is, when people think about doing away with distinctions, they usually think that people would then all be like them. Atheists dream of a peaceful world where everyone is atheist. Christians dream of a peaceful world where everyone is Christian... If we did away with ethnic/cultural differences, what language do you envision the world speaking? What do you imagine would happen to Confucianism? Or the Yoruba spiritual tradition? Or the Maori traditions? Will you be drinking your tea with butter like the Tibetans? Or will they be drinking iced sweet tea?
Anyway, you will get your wish soon enough. The Chinese historically did not eat beef, and now there's McDonald's everywhere. And in a tea-drinking nation, Starbucks. And the last time I was in Beijing, I was shocked and dismayed and bemused to see a three-story Walmart.