That page is what I would definitely not characterize as a proper source. From the page itself:
> Any attempt to estimate a total number of killings under communist regimes depends greatly on definitions, and the idea to group together different countries such as Afghanistan and Hungary has no adequate explanation.
There doesn't seem to be a real consensus on what actually should be counted or not. But I'm ok with taking the widest, most encompassing definition. One should wonder then, what number would we get if we apply the same definition to pro-Western/capitalist countries?
> Any attempt to estimate a total number of killings under communist regimes depends greatly on definitions, and the idea to group together different countries such as Afghanistan and Hungary has no adequate explanation.
There doesn't seem to be a real consensus on what actually should be counted or not. But I'm ok with taking the widest, most encompassing definition. One should wonder then, what number would we get if we apply the same definition to pro-Western/capitalist countries?