PARIS — The usually mild-mannered president of France pointedly reproached President Trump on Saturday after Mr. Trump commented on the dangers of terrorism in Paris, reminding the American leader of a cardinal rule in diplomacy: If you want to keep your friends, don’t criticize them in public.
“I think it’s never a good idea to show the least disapproval with respect to an ally,” said François Hollande, the French president, at the opening of an agriculture exposition in Paris. “I wouldn’t do that to an ally and I would ask that the American president not do that with regard to France.”
Mr. Hollande was responding to remarks Mr. Trump made on Friday at the Conservative Political Action Conference, in which he implied that Europe’s open borders had led to the terrorist attacks there.
Mr. Trump pinned his assertions on a friend named “Jim,” who he said had stopped going to Paris because “Paris is no longer Paris.” Mr. Trump said his friend had stopped traveling to the French capital four or five years ago, which was before the terrorist attacks there…