Culturually speaking why are?

I think we are all meant to mix one way or the other. In Europe long time ago, all cultures used to mix. Spaniards mixed with some Israelis, Northern Africans with Arabs. Italians with the Moors, and Mongolians with some Russians. It's just meant to happen. Now with all the technology everyone can connect with everyone and people learn about other cultures, and it wakes up their interest. What everyone wants is just to be happy. We are all in the pursuit of happiness.