discourse
Explanation
The Joke
A police officer pulls over a driver and says, "I saw that parking job out there." The driver responds curtly, "Well, I don't like your attitude." The officer fires back: "Oh yeah? I don't like YOURS." In the next panel, the scene shifts to what appears to be a workplace or social setting. The officer (or a similar character) says something along the lines of: "It's aggressive, yet based in facts, combining logic with vigorous provocation." Meanwhile, another person responds: "When does it ever end? You're doing nothing to change minds." Someone replies, "You doing anything is pointless."
The comic satirizes the futility of hostile interpersonal exchanges and how they mirror the tone of online discourse. What begins as a mundane traffic stop escalates into a back-and-forth of mutual hostility where neither party is interested in a productive outcome -- they are simply lobbing attitudes at each other. The comic draws a parallel between petty real-world confrontations and the way people engage in online arguments.
The Humor
The humor comes from the way the comic captures the self-defeating nature of aggressive discourse. Each person's response only serves to further entrench the other's position. The escalation from a parking complaint to philosophical observations about argument style is a classic SMBC move of taking a mundane scenario and finding the absurd intellectual thread within it. It satirizes the common experience of watching (or participating in) arguments where everyone is more interested in winning than communicating.