One problem with getting African-Americans to regard the conservative movement with anything other than antipathy is that movement's persistent proximity with white racists. National Review is seemingly the house organ for sane conservatives. Up until last week they regularly featured the writing of an admitted racist John Derbyshire and "race realist" Robert Weissberg.
Above you can find Weissberg, discussing how he believes Jews view blacks. If you are black, be careful. The urge to punch through your monitor will prove quite strong. What's most insidious is Weissberg implicates other Jews in his attempt to rehab the word "schvartze." (It's not like Nigger!) National Review's editor Rich Lowry was obviously "shocked and appalled." Alex Pareene shows even more links.
Again the thing to note here is the base level of inhumanity you see on display. Never forget that when Derbyshire is telling his kids to cultivate black friends and use them to deflect charges of racism, he isn't merely responding to, say, the rhetoric of Al Sharpton (which would be bad enough) he is responding to the death of someone's child, Pay close attention to Weissberg's tone toward African-Americans.
When white resentment is a significant plank in your platform, cruelty follows.