The “amazing polarization of society” and the violence in Washington “creates a lot of deterrence in other societies,” Mr. Emmanouilidis said. “We see where it leads, we want to avoid it, but we are aware that we too could get to that point, that things could escalate.”
If economies tank and populists gain power in France or Italy, he said, “God forbid when Europe faces the next crisis.” That concern — with an eye on the 2022 election — seems to have been partly why Chancellor Angela Merkel of Germany has been so solicitous of France and of the demands of Mr. Macron.
In Poland, the government has been very pro-Trump and public television did not acknowledge his electoral defeat until Mr. Trump did himself, said Radoslaw Sikorski, a former foreign and defense minister who is now chairman of the European Parliament’s delegation for relations with the United States.
“With Trump’s defeat, there was an audible sound of disappointment from the populist right in Central Europe,” Mr. Sikorski said. “For them, the world will be a lonelier place.”
President Andrzej Duda of Poland, who met Mr. Trump in Washington in June, has simply called the Capitol riot an internal matter. “Poland believes in the power of American democracy,” he added.