The root cause of your problem is the fact that human evolution has not prepared most Negroes for the intellectual and social demands of civilization. These are intelligence, obedience to the law, and monogamy. Characteristics that enabled the ancestors of Negroes to thrive in the tribal environment of sub Saharan Africa earn for many of them felony convictions in civilized countries. This is why the civil rights legislation and the War on Poverty have been followed by increases in black social pathology, Jim Crow legislation was based on sound instinct.
Cold climates select genetically for intelligence and monogamy. Civilization selects genetically for intelligence, obedience to the law, and to a somewhat lesser extent, for monogamy.