Exactly...
I could argue that most constituency groups habitually bound to specific political ideologies will usually continue to vote for that party unless they change their habitat. By that I mean media ie. radio stations listened to, or where one lives etc.
Have you ever listened to any of the morning shows on the hip hop stations? You can't imagine the anti-republican vitriole, it borders hysteria. Church leadership tends to run along the same lines, and the race hucksters like Jesse continually enforce the us against them. So am I surprised that minority constituent groups continue to vote as a bloc? No.
As a pragmatic voting Libertarian, I've found when pressing individuals of any background on specific issues as opposed to party identity over 90% agree with most hardline Libertarian positions. Will these people vote Libertarian, probably not. Political party's are also cultural identities. This is perfectly normal, and it perfectly normally changes as habitats are shifted.