Beria really was in charge of the early Soviet nuclear weapons program, and, while everyone was terrified of him, he was apparently good at managing the program. The classic joke about that, and it may not have been a joke, is that after the first bomb worked, the people who would have been shot if it failed got the Hero of the Soviet Union award. The ones that would have been sent to a labor camp got some lesser awa…
" he was apparently good at managing the program." That's one thing a lot of people don't understand. A lot of these monsters aren't just monsters but they are also very capable. Beria was a good manager, so was Himmler who led the Nazi SS. Stalin also was a hard worker and a master bureaucrat.
Beria was by all means a horrible person. But Khruschev (or anybody else really that high up the Soviet totem pole) was as much of an executioner and a murderer. It's just that Khruschev has won and he got to make Beria a (justified) boogeyman. Now we know of Khruschev as just an inefficient manager who took off his shoe at UN and not as a person who called arresting 308 people a poor performance for 1936 Moscow or a person who orchestrated bloody repressions in Ukraine.
At the same time, although Beria's activities were pure terror during Stalin's rule, chances are, if Beria did come to power, he'd have been a better ruler than Kruschev from the humanistic perspective (less people would have been murdered and sent to camps, less errors made etc.). But that's a lot of "ifs".
It does sound wild (to me as well), but then there is evidence of USSR party elites (e.g. Kaganovich) turning from maniacs and terrorists into peaceful bureaucrats overnight upon Stalin's death.