A measure of autonomy in eastern Ukraine is the only way out of this crisis | Simon Jenkins

Nato's treatment of Russia almost guaranteed a chauvinistic reflex. The way forward is to implement the Minsk settlement

The movement of troops round the Ukrainian border now clearly heralds a crisis. Russia's level of provocation is grotesque, but nothing on the ground poses any strategic threat to Britain or any other western government, or even to Europe's security as a whole.

Ukraine's relations with Russia have been fraught since the toppling of the pro-Russian president Viktor Yanukovych in a coup in 2014. The country is split. When Russian-speaking eastern Ukraine rebelled, it was aided by Russia. Moscow seized Crimea. The longstanding ties with Russia were one reason why Nato left Ukraine out of its reckless post-Soviet rush to advance its security boundary as near as it could to the Russian border during the 1990s.

Simon Jenkins is a Guardian columnist