They know, they just don't openly say it. No one has answered your question here. They primarily view the voting bloc that those rural Alabama voters are in as a problem to be dealt with. Actually governing for them is figuring out how to disenfranchise those people because they are inherently bad. Note that everyone is apparently allowed and encouraged to vote as an ethnic bloc except those people.

people vote as individuals

there is no evidence that votes are being coerced or forced or revealed to authorities. only that homogenous groups tend to have homogenous political opinions as well. that is not some untoward ill that is a risk to America.