How did changes in society relate to the resurgence of the Ku Klux Klan?

The Ku Klux
Klan (KKK) had a resurgence in the 1920s.  Its resurgence came about because of changes to
society that made American society more modern.  The KKK was based largely on a desire to have
society return to traditional ways.

In the 1920s, the United States was
moving away from traditional ways in a number of respects.  For one thing, it had become a
country with a large number of immigrants.  Many of these immigrants were not Protestant but
were, instead, Jewish or Catholic.  A second factor was the changing of values in the cities. 
This was the time of the flappers and jazz.  It was a time when women were doing things like
smoking in public and sexual values were supposedly deteriorating.  All of these things bothered
people who believed in traditional morals.

This led to the resurgence of the
KKK.  It promised 100% Americanism.  It opposed immigrants and it opposed Jews and Catholics. 
It wanted a return to the old social and moral values.  In other words, it got its impetus from
the backlash that was arising among many people against the new ways.