It’s only about blue jeans? It’s not about pissing Americans off so they are less productive and overall are less able to defend against additional attacks?
China is going for a Culture Victory after watching America land Culture Victory after Victory for the past better part of a century. America does not appreciate the challenge, not the least because it can't compete anymore.
Also, seeing as you took "blue jeans" quite literally I am going to assume you never played Civilization. For being a child-oriented game filled with memes it's actually very insightful about human psychology, I recommend playing it.