Imagine a city that is, say, 95% white. Let's run an experiment with this city. Arrange it so there are no middle class jobs for anyone. No factory work, etc. Make all available work in this city part-time service jobs, if any work is available at all.
Then provide financial incentives for fathers to abandon their families, maybe $500 a month. Then provide financial incentives for mothers to have more children, at maybe another $500 a month.
Do not allow the schools to discipline troublemakers, or hold their students to high standards.
I submit that in 30 years this 95% white city would be a crime-infested cesspool.
Sure, there are other factors involved in today's Baltimores. MSM agitators, for instance. But I hope you see my point.
Is one required to be "black" in order to not have a middle class job?
Is one required to be "black" in order to be limited to part time service jobs (if any)?
Is one required to be "black" in order to receive financial incentives for fathers to abandon their families?
Is one required to be "black" in order to receive financial incentives for (single) mothers to have more children?
Is one required to be "black" in order for schools to not discipline troublemakers or hold students to high standards?
There are quite a few middle class jobs in inner cities, many government jobs: teachers, policemen, firemen, postal workers, hospital workers, all sorts of local government jobs.
Unemployment is certainly above the national average, but not as bereft of jobs as you make it sound.
I believe you have it. The lower class districts of Britain have historically (and thus pre-immigrant invasion) been dangerous, high-crime areas for both residents in general and visitors in particular. Feral humans can be of any race. Although blacks were poor in the first half of the 20th century, their family structure was intact and most showed dignity and self-respect in the face of their situation. These good qualities have been lost by too many in the last half century.
Sorry but Bull
Example: West Virginia
It meets all your criteria and the some (It's like 98% white), yet it's crime rate is way below average