German Chancellor Friedrich Merz has stated he would advise his children against living or studying in the United States, citing a rapidly shifting social climate and limited opportunities for even highly educated people. These remarks underscore growing tensions between the US and its European allies under President Donald Trump, with disputes over trade, the wars in Ukraine, and Iran straining the NATO alliance. Merz previously angered President Trump last month by suggesting the US was being humiliated in the Iran war. This was followed days later by Washington's announcement of a partial troop withdrawal from Germany and increased tariffs on European Union cars, a sector where Germany holds significant strength. Speaking to a young audience at a Catholic convention in Wuerzburg, Merz also cautioned against a "disaster mode" mindset regarding global affairs, urging Germans to embrace optimism about their own nation's potential.…