So the point is????
Stalin ordered the death of thousands of people, including, at one point, some 30,000 in his own army, including about half of the officers. He ordered the execution of 800 political opponents at one point, accusing them of various crimes and sending them to their deaths without a trial. He forced milions of ethinic minorities out of the country. He underestimated Germany, ignoring a personal message from Winston Churchill in 1941 that attack from Germany was imminent (he didn't believe it would occur until 1942) and left important cities insufficiently protected. Irate, he called the leader of the military in Minsk and that leader's two top generals to Moscow and had them shot.
In addition to the thousands he had killed, he imprisoned many thousands more, without trial, and based on his say-so that they were somehow guilty of some sort of conspiracy against the government.
I could go on, but if you're trying to compare Stalin to any modern-day ruler, I'm having trouble seeing that claim as anything other than a variation of accusing someone of behaving like Hitler. Even some of the most dangerous and/or inept leaders of countries such as North Korea and Zimbabwe have a ways to go to match Stalin's ruthless reign of terror.