Why did dinh diem lose the support of many in south vietam?

Dinh Diem lost the support of many in South Vietnam due to his authoritarian governance, which suppressed political dissent and marginalized various religious and ethnic groups, particularly Buddhists. His regime's favoritism toward Catholics and the harsh repression of Buddhist protests alienated a significant portion of the population. Additionally, his inability to effectively combat the growing communist influence and the perception of corruption further eroded public confidence in his leadership.