In the 1920’s Fundamentalism was spreading around the U.S.  Protestants were becoming threatened by the Jewish and Catholic Immigration to the U.S.  many protestants became members of the Klu Klux Klan.  The KKK was once again formed in Atlanta in 1915.  By the mid 1920’s the KKK spread to the North and the West.  It was clear that Protestants were trying to eliminate any other religion and keep the U.S. as a Protestant majority.

http://www.youtube.com/watch?v=5CTG58jIlNA