Blacks and Hispanics are clearly not social conservatives, not in life, culture, or voting, so the explanation is elsewhere.
I agree 100%.
I've seen many articles about the black community and homosexual marriage (the experts tells me blacks are very conservative on this issue)
I've seen many articles on Hispanics and abortion (the experts point out that, as Catholics, the Hispanics are very conservative on this issue).
I could list other issues -- but it's all bosh. As far as demographic generalities can go, one should simply say that (in general) blacks and Hispanics like to get free stuff from the government, and that no other issues really matter to them.
The lesson for me: Republicans should not attempt to pander to these blocks -- the Democrats will always pander more successfully.