So Nation-State murder is bad, and is on a much larger scale than individual murder.
But what opinion do you have of Beria's sex crimes, and how in the 90s we find lots of women skeletal remains at his Villa. (Aka we now think he raped and then murdered said women.)
Do you believe that this is likely to have occured, or you think such things are all a conspiracy?
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Of course from a Utilitarian perspective there are dozens of better realities where different leadership emerged after the death of Stalin.
An "infinity of worlds" of better ways this could have turned out. An infinity of worlds where less people died for how one runs a Nation-State can cause thousands to millions of people to have shorter lifespans due to natural (but preventable human causes) / but also unnatural deaths due to having TYRANTs run the government.