The terrorist plot foiled by German security services makes abundantly clear that far-right extremism is not a uniquely American problem, but a pervasive threat to Western democracy. In a series of raids across Germany, 3,000 members of law enforcement apprehended 25 people suspected of plotting a coup. Eerily reminiscent of certain aspects of the Jan. 6 attack on the U.S. capitol, the plan called for storming the Bundestag (parliament), murdering the chancellor and seizing ministers. The plotters are associated with the Reichsbűrger movement, an anti-government group with approximately 21,000 followers that denies the legitimacy of the Bundesrepublik Deutschland (Federal Republic...