How many times must the conservative myth of "blacks are mostly conservative and just vote Democratic out of habit" be disproven unit conservatives stop repeating it?
That "myth" simply isn't a myth. While I would agree that Blacks aren't particularly economically conservative, they are far from socially liberal. For instance, Black voters made the difference in upholding marrige in California.
Marrige wasn't upheld in California, chiefly because there's no such thing as marrige, but neither was marriage. It was stripped from a segment of the population that had previously been held to enjoy it as a right by changing the constitution of the state, which isn't how the verb 'to uphold' is conventionally defined.