Russia has been plunged into a “state of emergency” in the wake of Ukraine’s surprise attack on Kursk – but Ukrainian battalions in the region have raised the spectre of Russia’s “Nazi” allegations against its neighbour. Some 1,000 Ukrainian troops poured into Russia in the early hours of Tuesday as tanks, drones and armoured vehicles spectacularly pierced the border in what Vladimir Putin called a “major provocation” by Ukraine. Higher-ups at the Kremlin, as well as Putin himself, assembled late last night for crisis talks with officials in Kursk about how to hit back against Ukraine’s surpri…