Your assumption that a race (one to which you do not belong, of course) is somehow -
genetically? - more disposed to committing crime than is yours is noted. In fact, new-comers are more apt to commit crime anywhere. Changing neighborhoods experience more crime than do stable ones.
Parochial variations and personal anecdotes are in no way indicative of the nation as a whole, and every community has its own contributory factors, of course. I spend summers in the town of Oak Bluffs as do
many Black Americans. I have never been concerned about crime when I am there.
The FBI identifies generally-applicable factors contributing to crime as population density, the degree of urbanization, size of the youth population, and the stability of its population, modes of transportation and highway systems available, economic conditions, education, religious characteristics, divorce rate, climate, the effectiveness of law enforcement, criminal justice policies, attitudes towards crime, and how often crime is reported can also come into play.
Crime rates in the US have been
going down for decades, incidentally, contemporaneous with economic advancement that has resulted in far more Black Americans being able to afford to live in the suburbs.