Historically speaking, why have 100% of communist governments throughout history been authoritarian regimes where dissidents are imprisoned, exiled, tortured, or murdered? Other political systems do not follow this rule.
Liberalism: Allows for broad freedom of expression and association, with assassinations of dissidents relatively rare.
Fascism: Several fascist governments, mainly from the 21st century, such as Meloni in Italy or the Freedom Party in Austria, among others, maintain freedom of expression and association without cases of political assassinations or torture.