Goldwater's speech was very critical of mistakes made by the previous presidential administration of flexible-response foreign policy.
Explanation:
Kennedy's administration achieved peaceful resolution of the Cuban Missile Crisis and refrained from further escalation of the Berlin Crisis of 1961. He helped to create created the Alliance for Progress, the Peace Corps, Food for Peace, and the Agency for International Development. However, Kennedy's policies also led to implementing the Bay of Pigs invasion and escalation of the Vietnam War.
Because Reagan viewed the Soviet Union as an "evil empire" that was unstoppable in terms of spreading communism and related oppression if the United States did not act to stave off the spread of Communist rule worldwide.