Well I'm happy this film is doing so well with the box office, and encouraged by the willingness of people to invest in a story that is not based on some other IP, I don't want to be blind to the flaws of the movie simply because it succeeds so well and in most aspects. Let me start with the positive things and then move on to a couple of the main criticisms that I have of Ryan Cooglers's "Sinners".
The film takes great effort to set a time and place where there is automatically discomfort in the normal settings that the principles find themselves in. A pair of twin black brothers have returned home to their southern roots after having ripped off the mobs in Chicago, well into the Great Depression. The hometown they have returned to, seems calm on the surface, and supposedly the Klan is no longer in operation, but that doesn't mean that it's roots are not still near to the surface. The brothers are attempting to create a social club that caters to the local black population, in particular to their taste in music dancing and other frivolities. Most of the social tension that you get at this point is set up for atmosphere, but later on director/writer Coogler, tries to use it as a plot point to finish off the film and that doesn't quite work.
Anybody who chooses to see this will know that it's a horror film, but it does take a while for the horror elements to develop. There is some early mumbo jumbo about hoodoos brought from the African Homeland, and maybe some of the Caribbean influence as well. All of that is really in aid of developing a secondary character who will provide some exposition later in the film. The ability to recognize vampires doesn't really require all of that, but the film goes through the motions anyway.
The characters in the film do the most to create an atmosphere of dread without any particular source. Michael B, Jordan plays the brothers as a pair of menacing hoodlums who recognize their own depravity, but proceed to live life as if they are the ones who are in the right. Their younger cousin, a musician with dreams of blues mastery, gets mixed up in their plan to create a juke joint that will bring in big dollars and hopefully provide him some fame. The brothers are not interested in him becoming a regular part of the entertainment. They seem to sense that this is a one-off opportunity, it's going to have some negative consequences, and they appear to be trying to avoid trapping him into their own lifestyle. That's about as close as being noble that the two hoodlum Brothers get.
It takes an hour or so for the supernatural element to enter the story, and when it does it's pretty creepy. The rapidly multiplying population of monsters sets the stage for a siege segment that is the main action sequence of the film. Viewers steeped in Vampire lore will understand some of the rules that are being followed, but there are also some things that don't make a lot of sense.
This is where some of the flaws of the film come in. The rules of the world that they have created seem a little ambiguous. Why becoming a vampire turns you into a virtuoso musician, singer, or dancer is not clear. Characters who are turned seem to maintain the personas of their earlier selves, but never for long and it's not clear what's driving them. Also for a group of characters who are so intelligent as to give a philosophical justification for their actions, they don't seem to have planned for the arrival of dawn. Which for vampires is a pretty short-sighted fault.
The best things about the film are the musical sequences which integrate Blues roots into the plot line. In fact it might even be acceptable to call this film a musical based on the number of scenes where the primary emphasis is on a performance. The scenes of the cousin playing guitar in the car, or performing in the Juke Joint, are excellent. The scenes of the vampires trying to use music is a way of enticing themselves into the Juke Joint are also quite good. Apparently being dead can turn you into quite the Irish dancer, I'll have to keep that in mind for future reference.
Well the film is superior in a number of ways, it does suffer from some of the typical faults of horror movies. The main characters have to make stupid mistakes, someone has to violate the rules, and there will be choices that will make you scratch your head. As usual I try not to give away any spoilers in these posts, but a little of what I'm about to share with you might hint in that direction so proceed in reading with a little caution.
Ryan Coogler cannot find an exit for the movie. He creates a scenario which allows for a satisfying murder of dozens of violent racists, but it has nothing to do with the main plot of the film and it feels tacked on. Even when it's finished, he is still not done. There's a final twist in the film which is designed to give us one more musical interlude, and a take which seems to suggest that giving in to being a vampire isn't necessarily all that bad. The movie should have ended 20 minutes before it did. And regardless of how good the song is or how satisfying an extended sequence of cathartic violence might be, it's got nothing to do with the main story and it feels like padding. Coogler needed his editor to twist his arm a little bit and say "let's stop here".
So the production quality on the film is great, the actors do a terrific job, and the horror story works pretty well even with some of the flaws. It all gets diluted by Coogler's attempt to turn the film into a social commentary. Something that was not needed in order for the film to be worthwhile.