The answer is simple:
Blacks Vote Democratic over 90% for race-baiting Liberal scumbag politicians.
And because they advocate being treated differently and dependent on society, they ironically ensure they will live on a segregated plantation as helpless slaves.
Anytime they decide to join a color-blind society and integrate like Italians, Chinese, Russians, etc. they will be indistinguishable and prosperous.
Self-described victims always blame others for their own failings.
They are, unfortunately, reaping what they have sown.
The welfare state only encourages this failure of culture, whatever the racial background, ie. look at France and England.