We must scrupulously guard the civil rights and civil liberties of all citizens, whatever their background. We must remember that any oppression, any injustice, any hatred, is a wedge designed to attack our civilization.

Franklin Delano Roosevelt (1882–1945) American lawyer, politician, statesman, US President (1933–1945)

Letter (1940-01-09) to William Allan Neilson
    (Source)

Neilson was the co-chair of the Sponsor Committee, Fourth Annual Conference of the American Committee for Protection of Foreign-Born. It was read to the conference on 1940-03-01, and entered into the Congressional Record (along with other letters received) on 1940-03-11.

Just over two years later, 1942-02-19, FDR signed Executive Order 9066, authorizing the evacuation of all persons (which largely meant Japanese-Americans) deemed a national security threat from the West Coast to internment centers further inland. The EO was in effect until rescinded by Roosevelt in 1944-12 after the Supreme Court ruling in Ex parte Endo.