They don’t. They think she is a crook but some will vote for her because they are on the government assistance plantation, many won’t vote at all, and some of the men will vote for Donald.
Many more black women vote than black men and nobody really likes Hillary except for some nut job feminist. The vast majority of the votes Hillary will get will be against the Republicans and against Trump. Trump should win big.
While blacks seem less enthusiastic about Hillary than most Dem candidates, the fact is that most are paid in some form or other to vote Dem. Many of those not on the dole are in jobs that are melanin-based (especially gubmint jobs), and the gubmint workers are voting the same as their peers of other races (white workfare recipients, for example).
Without melanin-based jobs, black unemployment would be 90%+