Her own father went on radio to condemn her comments. A Confucian, Chương said that the regime had alienated "the strongest moral forces", implying that they had lost the Mandate of Heaven. She responded by calling him a "coward". Her mother said that "There is an old proverb in my country which means 'one should not make oneself or one's family naked before the world'... I was sick... Now, nobody can stop her ... She never listened to our advice." After these comments, the U.S. ambassador, Frederick Nolting, told Diệm that if he did not denounce his sister-in-law's comment in public, the U.S. would have to stop supporting him, but the president refused to do so, and assailed the monks. In an interview with David Halberstam, Madame Nhu said that it was "embarrassing to see people leaders so uncultured claiming to be leaders". The U.S. embassy told Diệm that these comments violated an agreement between the Buddhists and his regime to avoid verbal exchanges, but Diệm refused to keep his family's end of the bargain, saying that his sister-in-law was obliged to expose "extremists" to keep the public informed. In July, the U.S. government rejected a request from her to travel to the United States for a public speaking tour, fearing a public relations disaster. On 3 August, she called the Buddhists "seditious elements who use the most odious Communist tactics to subvert the country."