Anti-Catholic organizations

The Ku Klux Klan, sometimes referred to as the Klan, is an American Protestant-led white supremacist and far-right hate group. Historians widely identify it as one of the earliest terrorist groups in the United States, citing its organized use of violence and intimidation to influence political and social conditions, particularly in the post-Civil War South. Across its three major iterations, the Klan has operated as a secret society made up of multiple affiliated organizations that used threats, assaults, and killings to advance their aims. Over its various eras, its targets included African Americans, Jews, Catholics, and immigrants.

Dutch political party

Protestant fraternal order originating in Northern Ireland

thumb|A notable 1875 editorial cartoon by Thomas Nast, a German immigrant to the United States who had been raised as a Catholic. It portrays bishops as crocodiles who are attacking public schools, with the connivance of Irish Catholic politicians. Published in Harper's Weekly, May 8, 1875|300x300px

American political movement and party in the 19th century with anti-catholic tendency

insurgent group in Ukraine

Kenyan religious organization (2003-)

White supremacist group in the US in the 20s, splintered from the Ku Klux Klan

anti-Catholic religious movement in Austria

political party in Austria-Hungary

The Tannenbergbund (, Tannenberg Union, TB) was a nationalist German political society formed in September 1925 at the instigation of Konstantin Hierl under the patronage of the former German Army general Erich Ludendorff. Part of the Völkisch movement, it was meant to counteract the Der Stahlhelm veterans association as well as the reorganized Sturmabteilung (SA) of the Nazi Party. The TB failed to meet the goal of a far-right collective movement and sank into insignificance long before it was officially banned by the Nazi authorities in September 1933.