It reminds me of Bob's reaction to Three Billboards Outside Ebbing, Missouri. Here we have a film that subverts expectations (key phrase here) in the sense that over the course of the film, it shows the conflict that it sets up to be much less clear-cut than it initially appears, and challenges the audiences' sympathies with a premise that has been done before (lone person takes a stand against an unjust system) and where it would be very easy to root for the protagonist and paint her as unquestionably heroic. However, it treats all its principle players with sympathy no matter how repulsive they may seem and shows them to all have legitimate competing interests, thus forcing the audience to think about who's in the right. Now because Bob's ideology dictates that these people are irredeemably awful based on their skin-color and geographic location, and the movie subverted his simplistic Manichean worldview, he has a strong negative reaction to it. It's nothing like Star Wars or Marvel, which paint in broad strokes, feature exaggerated worlds and characters, and deal in black-and-white morality: this is a movie that deals with real people in the real world and complicated moral issues (albeit through a darkly comedic lens), all of which Bob either doesn't understand or simply doesn't care about. To him, subverting an established work is good and intelligent, but subverting and challenging his ideas on morality and how the world works is haram.