I think you are correct with your assessment. Hearing the callers - especially the blacks - on KLBJ today, they still think he walks on water.
You are correct. He owns the Black vote because the vast majority of Black voters care more about being Black than anything else. It is the overwhelming element of their lives. Ethnicity is the goad that drives them and it is constantly on their minds. It colors their every perception.
It’s sad, really, because there is so much more to life than what color you are.