Up to 500,000 protesters, agitators and provocateurs had entered the city from across the country, many of them armed. They took over large swaths of the metropolis, hijacked private vehicles and confiscated private buildings.

Some soviet leaders including Vladimir Lenin called the event "premature" and did not publicly endorse it, which may have been a calculated attempt to avoid direct blowback. The official historical explanation is that the insurrection had taken on a life of its own, but the stage had been set and the communist agitators got exactly what they wanted, what their strategy demanded:

Human sacrifice.

Clashes with government authorities led to hundreds of protester deaths and a handful of police casualties. The Russian government surged military forces into the region to arrest Bolshevik captains and the movement had to pull back. In the end, though, the primary goal of the insurgents had been achieved. Whether spontaneous or planned, the point of the communist methodology is always to trigger government violence which can then be used to create public sympathy and bolster the revolution.

The majority of "normies" don't need to join the revolution, they just have to be convinced to stay out of the way. And that's largely what happened a few months later in October of 1917 when the Red Terror began. What followed was five years of civil war.

The communists, who had long claimed to be innocent victims of the Tsarist "imperialism", went on a murder spree as soon as they solidified their political power. Their ideological opponents were systematically rounded up and eliminated. There are no exact numbers on how many killings occurred because records were destroyed, but estimates suggest the revolutionaries and secret police arrested and executed around 1 million political dissidents in the first few years of communist rule.

This genocide, though, would pale in comparison to the 10 million deaths caused by the Russian Civil War. Not to mention the imprisonment and mass murder of millions of Christians by the atheist regime over the course of the next couple decades.

History rarely "repeats" but our modern political dynamic rings rather familiar. Many of the tactics used by the leftists in Russia in the early 20th Century are being used today in the US. In fact, I would argue they are almost exactly the same and that a Bolshevik-style revolution is happening right now.

Interestingly, the Bolsheviks were a tiny minority within the Russian population. At their peak in 1917 they had only 400,000 members. They were supported politically by an estimated 23% of the population, but that is still a small movement compared to the 150 million Russian citizens trying to live their lives from day to day.

Had Russian conservatives (nationalists, Christians and defenders of private property rights) stood up and acted en masse to stop the Bolsheviks early in 1917, their society could have avoided the full scale murder that would befall them from 1918 onward. They might not have aligned perfectly with their existing government, but the communist alternative was so much worse.