First, the country was a Nazi ally; then it became a NATO stooge. The latest allegation: It’s a reckless Russia-basher that deserves a ruthless response from the Kremlin. Who said Finland was boring? Amid all the focus on Russia’s war against Ukraine, it is easy to overlook another prime target of Moscow’s imperialist ire. Russia has long used a skewed interpretation of history as a weapon to attack and delegitimize its neighbors—and, if the Kremlin’s latest rhetorical escalation is any guide, it now has Finland in its gunsights. The Finns are understandably nervous, given recent precedent: In 2021, Russian leader...