Glenn L. Archer Sr., 96, who retired in 1976 as executive director of Americans United for Separation of Church and State, an organization that works to protect religious rights and church-state separation through court action and education, died Nov. 15 at Montgomery General Hospital. Mr. Archer was named director in 1948 of the newly established Protestants and Other Americans United for Separation of Church and State. It became the nation's best-known advocate of absolute church and state separation and a major opponent of government aid to parochial schools. Mr. Archer said in interviews that the schools had no right to exist "at public expense." ...Mr. Archer and his organization also charged in 1955 that U.S. Catholic cardinals who vote for a new pope violate U.S. laws and should forfeit their citizenship. He said U.S. law barred a citizen from taking part in a foreign election.