If it didn't cause so much damage, it would be ammusing when wealthy, elitist politicians say we the people MUST do some thing or other. That Eric Holder has even SUGGESTED that neighborhoods should "be more diverse" or whatever his phrase was shows a an ignorance of basic economics and sociology that is so complete that even I know more than he does, and that's not saying much.
Here's what I mean - people don't live in a particular neighborhood because the government tells them to, but because they find it a desirable place to live. The way people make that determination varies from person to person (not even from "group" to "group"). In other words, except for a very few - usually either those specially designated as "low income" or "Retirement Communities" or some such, or those occupied by rich elitists - neighborhoods don't choose the residents, the residents choose the neighborhoods.