牛弹琴：美欧直接开干，全世界看得目瞪口呆

Group 1 - The core issue revolves around the U.S. demand for Denmark to cede Greenland, triggered by a joint military exercise by European nations in Greenland [2][32] - The military exercise involved a total of 37 personnel from seven European countries, with Denmark being the only significant contributor [32][36] - Trump's response included a threat to impose tariffs on goods from Denmark and six other European countries, starting at 10% and increasing to 25% if an agreement on the purchase of Greenland was not reached [40][42] Group 2 - European leaders expressed shock and condemnation over Trump's aggressive stance, with calls for unity among European nations to defend their sovereignty [15][42] - The reactions from European leaders highlighted a divide, with some emphasizing the need to address the threat posed by Russia while also dealing with U.S. pressures [45][47] - Public sentiment in Europe showed anger towards the U.S., with protests demanding that the U.S. "get out" and affirming that "Greenland will not be sold" [47][49] Group 3 - The situation has been described as a significant moment in transatlantic relations, with some commentators suggesting it marks the end of the Atlantic alliance [49][50] - There are suggestions that Europe could retaliate against the U.S. through tariffs or other measures, but hesitation remains due to the complex relationship with the U.S. [52][53] - The ongoing tensions reflect deeper issues within European unity and the challenges of addressing external threats while managing internal divisions [20][56]