Answer
Ngô Đình Diệm supported Vietnamese nationalism against Hồ Chí Minh and Bảo Đại. Diệm was a staunch anti-communist who believed that communism was incompatible with Vietnamese culture and tradition. He also opposed the monarchy of Bảo Đại, whom he saw as a puppet of the French. Diệm's nationalism was based on the idea that Vietnam was a unified nation with a common history and culture.