Then why are so many of them are invading the less happy USA?
Since they are happy to come here. The United States should annex Mexico, Central America, and South America. All of the people are coming here and all of the raw materials can be used to pay for the illegal immigrant nonsense. None of the wars in this millennium have caused our enemies to fear us. Annexation of Mexico, Central America and South America would cause Putin and the others to fear the United States.