The Bolsheviks in the beginning were an infenitesima bunch. 1000 Jews is a large percentage. They were decision makers. They held key positions in the party and NKVD. Of course, they were almost all slaughtered in the end. But they played a pivotal part in messing up Russia. The Russians still hold the grudge.
The ‘Bolsheviks were Jewish’ story is sourced in Germany (check out Alfred Rosenberg).
Thinking about Jew-hate in Tsarist Russia, it’s unlikely many ethnic Russians would accept Jewish leadership. Jews there, on the other hand, could eagerly hope to ease the persecution of the Church and Tsar.
Jews like Osip Minor and Grigori Kipen make an interesting study, while Jewish military cadets were on the front line battling the Bolsheviks, who also had Jews on their side.
Jews practically invented the idea that there’s something wrong with the way things are, which is why Jews might be right-wing but are seldom ‘conservative’ politically.