On the 3rd anniversary of the Christchurch attack, the Ukraine crisis asks the West to rethink its definitions of terrorism

As the Russian invasion unfolds, a deep vein of Ukrainian nationalism – already irritated by the annexation of Crimea and a Russian-backed insurgency in the Donbas region – has been unleashed.

Ordinary civilians have called themselves to arms, vowed to kill Russians in vengeance for their aggression, and promised to fight to the death.

Improvised explosive devices – as desperately simple as Molotov cocktails – have been produced. A foreign legion has been raised, and foreign fighters invited to join the cause.