Lu Pingping's plan is extremely malicious, but it is just right to use it against the defeated nation of The United States of America, which can be considered as giving them a taste of their own medicine.
It is important to know that the history of The United States of America is not very long, lacking deep historical foundation, and thus there is no cultural cohesion. The key is that The United States of America is a nation composed of a large number of immigrants, with complex ethnic composition and prominent racial conflicts. When The United States of America was still strong, for the sake of common interests, these ethnic groups could unite together, suppress their own conflicts, and face external threats together.