Here's where I have been trying to go with the racial question. My question is, is just anything purported to come out of special revelation closed to moral evaluation based on natural moral knowledge? People have used special revelation to justify slavery, to justify flying planes into towers, to justify Indian genocide, to justify racial discrimination (the infamous curse of Ham), etc. Of course, all of these justifications came through interpretation, and those interpretations wouldn't be accepted by our best exegesis today. But could they have been refuted by the best exegeses at the time?
Suppose someone gave me an argument for Negro inferiority based on the Curse of Ham. Suppose I didn't know how to refute the exegesis. The best Bible scholar in town says it's what the Scripture means. But I am troubled. Even though I can't refute the exegesis, I just can't believe that God would curse a whole race of persons in perpetuity for the indiscreet act of their ancestor. I can't believe God would justify keeping those people enslaved for that reason. If God is like that, then God doesn't make sense. But my Bible student friend says "God said it, I believe it, that settles it. Do you dare answer back to God?" Of course, there's a problem with the interpretation, but I don't have access to good Bible scholarship, so I can't know that.
If I were in that situation, must I believe that blacks are inferior? The best exegesis available to me (flawed though it might be by seminary standards) says that I must.