Question

What is the constitutional basis of justice Murphy’s dissent

Answer 1

equal protection doctrine, and it should have protected the young Korematsu from being sent to an American internment camp

Answer 2

Justice Murphy was against the approval of the exclusion of all people of Japanese ancestry, whether alien or not from the pacific area in a context in which the had military necessity as a result of a lack of martial law. That is, that he disagreed on racism installed by the 5th amendment of the constitution.