During the 1920s, there were cultural conflicts between those who wanted to maintain traditional American ways and those who were in favor of change. The traditionalists believed that the influx of immigrants was bringing on an attitude in which different cultural values were seen as acceptable. They felt that traditional values were being undermined by the immigrants who tended to be Catholic or Jewish and who often had radical political beliefs.
The conflict over immigration, then, was a symptom of the general cultural conflict of the 1920s. Traditionalists believed the culture they believed in was dying and they felt that immigrants were one cause of this change.