The Welfare state has completely destroyed the back family in America, an institution that had up until then survived slavery and harsh civil discrimination. If you tell an underprivileged group that they are where they are through no fault of their own and feed their inherent need to find a group to blame, you also convey a very powerful message that there's nothing they can do to get out of their hole, when in fact leaving poverty in the US is extremely easy compared to other parts of the world.
But instead what you have are parents who never get any sort of an education, don't manage to stick to any one job, mothers that have children by thugs and quickly become separated(since the State will foot the bills for the kids), and a continuous cycle of children brought up without any sort of functional family environment and a lingering message there's really nothing they should be doing, it's just the evil whites keeping them down.