a lot of people compensate for a rather lackluster life by latching onto the achievements of others they can claim to be a part of "the same team" with. that's one reason people get so into sports, or why people act like they personally caused the United States to win World War 2.
any time you see someone refer to someone else's accomplishments with "we" ("we kicked your ass in WWII", "we won the Super Bowl", "we enslaved your sorry asses"), you're dealing with someone who needs more to do in their daily life.