putin has nothing at all on stalin - these sorts of political killings are unusual in that they are being made into intentionally obvious murders (unlike some of suspicious clinton associates or some of the iran-contra people's deaths, which were set up to look like accidents/natural causes), but as far as the numbers involved, he is not a speck of dust compared to josef stalin.
really shouldn't even be compared. multiply this stuff by about 1,000,000 and you might approach the neurosis-ridden monster that was stalin.