It was visually impressive and reasonably entertaining. Certainly not worthy of that many plaudits.
I think the vibe is deeper than a simple good/bad dichotomy. Given the setting is a rural Mississippi sharecropping community in the 1930s (and is told from the view of the black characters), there aren't many white characters to begin with. This reflects the fact that segregation wasn't just about laws but about life. The twins only interact with Hogwood to buy the sawmill. They are unaware or indifferent to his KKK status. My take is the latter; they don't care because business is business. He, in turn, is happy to sell to them because he plans to attack later. Bert and Joan (the only other white characters) don't interact with any black characters until they become vampires. They are also KKK and, crucially, their prejudice dooms them when the Choctaw try to save them.
The twins are violent gangsters. Their plan is to set up a juke joint for the local black community. Note that this is not a public service, but a money making scheme. They are looking to extract income from their impoverished patrons by selling liquor and entertainment. Remember also the disagreement between them when one patron wants to pay with scrip. One twin insists on cash only, indifferent to the circumstances of the patrons.
Remmick is white, but without racial prejudice. Quite the opposite. He speaks in an all-inclusive, quasi class-warfare way. Of course he's a vampire, so ultimately he doesn't give his victims a choice and to join his "utopia" you have to die/lose your soul.
The Chows are interesting. I thought it was a bit too on-the-nose for Coogler to have Asian shopowners in a predominantly black community. They own separate stores for white and black customers, which complied with the law but was also an excellent business opportunity. They eagerly join the twins as suppliers for the juke.
So what does this mean? There are many kinds of vampires. Some are purely predatory, some fill a need, but they all drain their victims.
