New York Jets vs World Trade Center

Okay, so basically, the joke is comparing the New York Jets (a football team known for losing) to the World Trade Center, which collapsed during the September 11 attacks. The punchline is that both "fall" in September, which is funny (in a dark way) because it links a sports team's failures to a major tragedy. You probably think 9/11 was just a movie. You are so dumb.