Why did America hate Castro?

America's animosity towards Fidel Castro stemmed from his communist ideology and his alignment with the Soviet Union during the Cold War, which was seen as a direct threat to U.S. interests in the Western Hemisphere. After his 1959 revolution, Castro nationalized American-owned businesses and properties in Cuba, leading to economic losses for U.S. investors. Additionally, the failed Bay of Pigs invasion in 1961 heightened tensions, as it represented a significant U.S. effort to overthrow him. Overall, Castro's defiance and the establishment of a communist regime so close to American shores fueled deep-seated hostility.