Alright Mohinder, I'll play along for just a little while longer and I will use very simple language so you can hopefully understand my analogy. The locusts are the Indians. The field they have already stripped bare, or wasn't fertile to begin with, is India. The green and fertile field they are swarming to is the United States. After they have fucked up the United States like they have with India they will swarm to a new field somewhere else, leaving that field stripped bare as India is.
Indians have no desire to become Americans. They have no interest in making America a better place. They have no intent on integrating with American culture and assimilating American values. They have no love for America and feel no patriotism for America, the same as every other foreign invader. They only care about America insofar as they are able to exploit America to enrich themselves. Once they have squeezed everything they can out of the American system, and left it in shambles due to their incompetence and savagery, they will move on to greener pastures elsewhere and feel no shame for having ruined America.
Do you understand now? I suppose I could draw it in crayon for you if that would help.