Using your definition, every country in the world is xenophobic.
The vast majority are. And their economies are suffering. Immigrants built this nation and they are still necessary for our continued expansion.
There's plenty of room and resources in America for the current flow of immigrants. They find jobs as fast as they can get here.
Life just keeps getting better as our living standard continues to rise. A rising tide lifts all boats. Why kill the goose that is laying the golden egg.