"Go back to where you came from" has long been the call of bigots and xenophobes in the U.S. It's what the Know Nothing Party of the 1850s said about Irish and German Catholic immigrants. It was aimed at Chinese immigrants who helped build the transcontinental railroad a generation later. It was hurled at Italian, Jewish, Slavic and other eastern and southern European immigrants in the late 19th and early 20th centuries. Civil rights opponents even tried using it against African-American activists, notwithstanding that their ancestors were dragged here involuntarily in shocking, inhuman conditions.
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