What diplomats call the Joint Comprehensive Plan of Action—known to the rest of us as the Disastrous Iran Deal—was agreed in Vienna a year ago this week. Now comes a status update, courtesy of our friends at the Bundesamt für Verfassungsschutz, or BfV.

In its fascinating 2015 annual report, published late last month, the German domestic intelligence service reports a “particularly strong increase” in the number of Salafists, describes the reach of Russian and Chinese espionage efforts in Germany, and notes a growing number...