The Immigration Act of 1924 was caused by a multitude of factors. Some of the contributing factors to this law was a huge spike in immigration in recent years, anti-foreign feelings, ethnocentrism, racial issues, and religious issues. The line to get in the door to the United states was teeming with millions of Europeans and Asians, and Americans did not want this huge influx of un-American traditions. Couple all those feelings with the "red scare" or bolshevism, and Americans did not want any part of new immigrants. Many Americans felt that America was a special breed (mainly consisting of Anglo-Saxon Protestant Northern European descent) and did not want to disrupt that with Asian, or even southern European Catholics. The Ku Klux Klan represented these feelings vigorously with their anti-foreign rallies and marches. Surprisingly many Americans not only tolerated them, but supported it as well. Many of the new immigrants who did manage to migrate to America did not fit into the "melting pot" theory. The "melting pot" theory was that America was a unique country was a blend of all of its cultures living in one place. Many of these new immigrants did not "assimilate" or mesh into the society they were now living in. Instead they were knitting themselves together in small urban lower-class sections and preserving their own cultural identities instead of assimilating into the American culture. Perhaps another reason for anti-immigrant feelings in America was the scare of the spread of communism. Bolshevism had spread wildly through Russia during their revolution and into parts of Eastern Union. Bolshevism was naturally an enemy of capitolism, and many Americans feared a showdown, or even a revolution from inside their own country by immigrants. Americans enjoyed their way of life during that time, and the new ideas that immigrants brough with them from their own culture scared many Americans.