Opposition to United States involvement in the Vietnam War An infamous photo of General Nguyễn Ngọc Loan shooting an alleged terrorist in handcuffs during the Tet Offensive also provoked public outcry. Another element of the American opposition to the war was the perception that U.S. intervention in Vietnam, which had been argued as acceptable because of the domino theory and the threat of communism, was not legally justifiable. Some Americans believed that the communist threat was used as a scapegoat to hide imperialistic intentions, and others argued that the American intervention in South Vietnam interfered with the self-determination of the country and felt that the war in Vietnam was
Canada in the Cold War middle power role in international affairs, and pursued diplomatic relations with Communist countries that the US had severed ties with, such as Cuba and China after their respective revolutions. Canada argued that rather than being soft on Communism, it was pursuing a strategy of "constructive engagement" whereby it sought to influence Communism through the course of its international relationships. Canada had far less of the anti-Communist hysteria that had afflicted the United States. The United States wished the Canadian government would go further, asking for a purging of trade unions, but Canada saw this as American hysteria, and left the