> difficult to say now that those were necessarily horrific and needless
The Khmer Rouge killed 1.5 to 2 million (or 25%!!!!) of all Cambodians. Pretty tough to argue that the deaths of 25% of any population is anything but needless and horrific, particularly when you learn about Pol Pot's insane and homicidal policies. Imagine if every 4th person you know were dead in the next 5 years because a guy had a plan to... make our lives better by ruining them indefinitely for some distant vision of Utopia.
The Nazis are truly astronomical in terms of both death count and evil. They successfully created an actual hell on Earth.
Stalin's regime is estimated to have killed 20 MILLION of his own people. I wonder if the murdered would say, "Yeah, but its worth it in the end because no more monarchy!"
Mao's derangements are estimated to have resulted in 45 MILLION dead Chinese. That's 45,000,000. Again, I wonder if their surviving loved ones felt better off? Mom was beaten to death for being "a capitalist", but at least we don't have to worry about that darned monarchy anymore! How would you feel if your Mom was beaten to death? How would you feel if your brother or sister were summarily executed based on an accusation? What if you saw your child needlessly starve to death? These aren't just numbers. These are real human lives extinguished for political ends.
Etc. Etc. Etc.
Your logic is truly deranged. Revolutions are really, really, really bad for everyone, and the vulnerable, weak, and poor are not exempt. Most of them can usually just count on good old fashioned starvation in their near futures as the revolutionaries lurch from one disastrous or insane policy to the next. If they don't starve, there's a good chance the revolution will at some point purify them anyway.
So, I'll point you back to my suggested heuristic.