Almost half of Danish people now consider the US to be a considerable threat to their country and the overwhelming majority oppose Greenland leaving to become part of the US, new polling has found. The research by YouGov, shared exclusively with the Guardian, comes after weeks of tension between Denmark, Greenland and the US over Donald Trump’s repeated assertions that he plans to take control of the autonomous territory, which is part of the Danish kingdom. The Arctic island, which has a population of 57,000 people, was formerly ruled as a colony by Denmark, which continues to control its foreign…