Black ministers are so firmly addicted to the kool-aid that G-d’s laws take second place to the Democratic party.
Almost nobody votes faith over pocketbook. In 2004 and 2008 black voters happily ticket-switched between voting against gay marriage and voting for Kerry and Obama, even though their election would be clear advances towards judicial imposition of gay marriage.
African Americans are overwhelmingly government dependents. The underclass depends on welfare, and seeks leniency for criminal offenses. The working and middle class is hugely reliant upon civil service jobs, affirmative action and civil rights enforcement. A meaningful portion of the small black upper class relies upon affirmative action and/or the profit margin / lavish executive compensation of administering welfare dollars that flow through for-profit and not-for-profit private administration.
A party of small government is only going to appeal to that small percentage of African Americans who make their living in the unsubsidized and unprotected private sector — and even then most will stick with their “community” even when in their heart they know it’s wrong.