As Karl's frustrations continue to build, he becomes increasingly isolated and disconnected from those around him. He begins to fixate on the idea that he is the last white man in a world that is rapidly changing and becoming more diverse. This belief fuels his anger and resentment towards society and ultimately drives him to embark on a violent rampage.
Throughout the movie, we see Karl's interactions with various people in his life - from his ex-girlfriend who has moved on to a new relationship, to his coworkers who he feels are taking advantage of him, to the diverse customers he delivers pizzas to. These interactions only serve to deepen his sense of alienation and fuel his desire for vengeance.
As Karl's anger boils over, he starts to target those he blames for his perceived failures and the changing world around him. The movie builds towards a tense and climactic showdown, as Karl's rage reaches its breaking point and he unleashes his pent-up fury in a violent and devastating act of retribution.
The Last White Man is a chilling and thought-provoking exploration of the dangers of unchecked anger and resentment, as well as a stark commentary on the impact of social alienation in an ever-changing world.