I believe the more we disperse ethnicity's and mix them the better off we will be. I believe communities can benefit from encouraging minorities to move in. The sooner we churn the melting pot, the sooner everyone will look the same. I think this is the only way we are going to be able to solve this problem.
Diversity in the community increases understanding among cultures and therefore increases peaceful solutions to the world's problems. A group of ethnicities helps the community bond together during holidays and festivals. Diversity in schools increases as well, which means children will be more well-rounded. More ethnicities mixing together in a community means a higher quality of life.
Yes, I think that having a group of ethnicities in the community is a desirable goal, because it makes the community that much more interesting. It is a good thing that we learn about each other. We also have the goal of integrating so that it is less likely that we have wars based on ethnicities that we do not understand.
Yes, having a group of different ethnicities is beneficial for a community. What it does is bring new goals and ideals to a community so that people better understand different individuals. Having a single type of people in one area makes people have tunnel vision, as some may call it.
A community should strive to have the best/most productive people in it. Race and ethnicity should not matter. Is having a group of 12 productive whites somehow worse than a group of 6 productive whites and 6 productive blacks? No, they are equally good. People generally group more based off of wealth and education than ethnicity. That's why whites and Asians often live together, but Asians and blacks living together are rare.