The "they're-taking-our-jobs" approach strikes me as amazingly socialist in that it assumes that a person is entitled to a particular job at a particular price because he wants it at that price and the government's job is to prop up that price regardless of market conditions.
I also believe that I have certain obligations to my country and my countrymen, and I do not want to see my countrymen lose work or suffer from declining wages as a result of mass immigration. If you'd examine American history, you would learn that many American statesmen felt the same way.