北约面临成立以来最严峻生存危机（环球热点）

Group 1 - The core point of the news is that the U.S. is imposing tariffs on goods from several European countries, which has raised tensions within NATO and could threaten the alliance's stability [2][4][5] - President Trump announced a 10% tariff on imports from Denmark, Norway, Sweden, France, Germany, the UK, the Netherlands, and Finland starting February 1, increasing to 25% on June 1 unless an agreement regarding Greenland is reached [2] - The European countries affected have expressed their discontent, stating that such tariffs undermine transatlantic relations and could lead to a dangerous cycle of retaliation [2][4] Group 2 - The situation regarding Greenland is seen as a "pressure test" for NATO, revealing how the alliance's rules are being challenged by a member state [4][9] - Analysts suggest that if the U.S. were to use military force to acquire Greenland, it could lead to the end of NATO as it would violate the principle of collective defense [3][5] - The trust between NATO's European members and the U.S. is declining, with Europe feeling increasingly vulnerable and perceiving the U.S. as a potential threat rather than a reliable ally [6][7] Group 3 - The ongoing tensions highlight a structural rift in U.S.-European relations, with Europe shifting from viewing the U.S. as a "reliable ally" to a "potential threat" [6][8] - European nations are responding to U.S. pressures by sending military personnel to Greenland, but this is seen more as a symbolic gesture rather than a strong counteraction [8] - The future of NATO is uncertain, with the alliance facing multiple challenges that threaten its existence, including differing national interests among member states [7][9]