Why did justice Frank Murphy dissent from the majority opinion

In his dissent, Justice Murphy condemned the majority's decision and rejected its reasoning. Justice Murphy wrote that the decision was nothing more than the "legalization of racism" and concluded, "Racial discrimination in any form in any degree has no justifiable part whatever in our democratic way of life.

Michigan's U. S. Supreme Court Justice Frank Murphy wrote an impassioned dissent in Korematsu, protesting the decision to uphold exclusion orders imposed upon persons of Japanese descent during World War II.