SINGAPORE — China put European patience to the test on Saturday, with a seasoned Chinese diplomat attributing Russia’s war on Ukraine to a failed security architecture in Europe. It fell to Dutch Defense Minister Kajsa Ollongren to challenge that very Chinese interpretation. “I was actually a little bit surprised to hear it,” Ollongren told POLITICO in an interview moments after she made an impromptu rebuttal of ex-ambassador Cui Tiankai on a panel at the Shangri-La Dialogue in Singapore. “It’s very, very false.” Cui, a former envoy to the U.S. and unofficially an adviser to the Chinese delegation at this top...