Young Stalin by Simon Sebag Montefiore

At age ten, Stalin had trapped a disliked teacher into a room, and, backed up by 18-year-old toughs, threatened to kill him. The teacher became compliant to Stalin's wishes regarding enforcement of the official ban on speaking Georgian in school (which Stalin disfavored)

"God's not unjust, he doesn't actually exist. We've been deceived. If God existed, he'd have made the world more just."
"Soso [Stalin]! How can you say such things?" exclaimed Grisha
"I'll lend you a book and you'll see." He presented her with a copy of Darwin [Origin of Species]

Stalin's very extensive organized-crime rackets, his early, close association with Lenin, and the tight, conspiracy composition of the predominantly Jewish Bolsheviks does make the Russian revolution look very much like a takeover by the Jewish mafia.