斯塔默告诉特朗普：对北约盟国加征关税，错了

Group 1 - The core viewpoint of the article is that UK Prime Minister Starmer criticized the imposition of tariffs by President Trump on NATO allies, calling it a "mistake" [1] - Starmer emphasized the importance of collective security for NATO allies during his conversations with various leaders, including the Prime Minister of Denmark, the President of the European Commission, and the NATO Secretary-General [1] - The article highlights the recent military exercise "Arctic Resolve" initiated by Denmark, which involves troop deployments from Norway, Sweden, France, Germany, the UK, the Netherlands, and Finland to Greenland [1] Group 2 - President Trump announced tariffs on eight European countries until an agreement is reached regarding the "complete and total purchase" of Greenland [1] - European nations have criticized Trump's tariff announcement and indicated potential retaliatory measures [1]