This is a moral failing of the church.  The "leaders" of this church apparently don't care about the economic consequences of uncontrolled immigration, especially when it's a scenario we currently have, a rich superpower with a generous welfare-state for anyone that breeds bordering a failed narco-state full of desperately-poor people who don't change their government to improve their own lives.  Mexicans and Latin Americans in general prefer to simply run away from their problems and bring their families, their culture, and their problems here to America and force us to help them.  No thanks.  Return to sender.  DEPORT.