Why? We’ll let YOU answer that one.
Mass killings under communist regimes occurred throughout the 20th century. Death estimates vary widely, depending on the definitions of the deaths that are included in them. The higher estimates of mass killings account for the crimes that governments committed against civilians, including executions, the destruction of populations through man-made hunger and deaths that occurred during forced deportations and imprisonment, and deaths that resulted from forced labor.
Different general terms are used to describe the intentional killing of large numbers of noncombatants.[a][b][c][d][e] According to historian Anton Weiss-Wendt, the field of comparative genocide studies, which rarely appears in mainstream disciplinary journalsm, despite growth of research and interest, due to its humanities roots and reliance on methodological approaches that did not convince mainstream political science, has very “little consensus on defining principles such as definition of genocide, typology, application of a comparative method, and timeframe.”[f] According to Professor of Economics Attiat Ott, mass killing has emerged as a “more straightforward” term.[g]
Several authors have attempted to propose a common terminology to describe the killings of unarmed civilians by communist governments, individually or as a whole, some of them believing that government policies, interests, neglect, and mismanagement contributed, directly or indirectly, to such killings, and evaluate different causes of death, which are defined with various terms. According to this view, which has been either ignored or criticized by other genocide scholars and scholars of communism, it is possible to have an estimated communist death toll based on a “generic communism” grouping. For example, Michael David-Fox states that Martin Malia is able to link disparate regimes, from radical Soviet industrialists to the anti-urbanists of the Khmer Rouge, under the guise of a “generic communism” category “defined everywhere down to the common denominator of party movements founded by intellectuals.”