Peter H. Ironsis an American political activist, civil rights attorney, legal scholar, and professor emeritus of political science. He has written many books on the U.S. Supreme Court and constitutional litigation... (wikipedia)
He felt responsible for the internment in a sort of backhanded way, because his case had been lost in the Supreme Court.
A hundred years from now, Rehnquist will be looked on as a chief justice who was consistently conservative and was fairly influential on the court in pressing for his point of view.