I live in Orange County, California. I believe that it's less than 2% black. However, those blacks tend to be fully integrated and upper middle class.
If you live in California, the "problem minority" according to alot of people are Mexicans/Central Americans. If you live in the northeast, Chicago, or the South, its blacks. Where I come from, folks have a better attitude towards Latinos (particularly if they are here legally) than they do blacks. That's just the way it is.
It is a class thing ... not a race thing. The folks you have just described would be accepted happily into any American community. In an emergency, they would not be among the throng of 100 or so Katrina evacuees, housed briefly in a brand new school, who trashed and destroyed everything that could be broken ... including many brand new computers ... and, even ripped the urinals off the wall.
Many major cities are beset by marauding bands of miscreants like this. Those who have not lived with a population that acts this way cannot possibly comprehend that objections to them are not based upon race but upon their abhorrent actions.