 The Ku Klux Klan, which preached a doctrine of Protestant control of America and suppression of blacks, Jews and Catholics, had a following in Stamford in the 1920s.Across the state, the Klan's popularity peaked in 1925 when it had a statewide membership of 15,000.Stamford was one of the communities where the group was most active in the state, although New Haven and New Britain were also centers of support.