How about we try this on for size: Whenever you adopt a philosophy that says the individual is subservient to a group or a nation, you create the conditions for dictators to arise. On the right, you get the ultra-nationalists who convince people to let them run the country ‘for the glory of the nation’. Saddam Hussein fits into this category, although he was ostensibly a socialist.
Communism and socialism are dangerous in this regard because they see a ‘higher good’ than the rights of the individual. Communism is pretty much a dictatorship by definition. I know it’s supposed to be a dictatorship of the proletariat, but in reality it always comes down to a ruling class telling the rest of the people what to do. No way around that. And once you have a ruling class, you have people who rise to the top through increasing levels of oppression and brutality. That’s why Communist countries are a breeding ground for the most vile dictators.
That’s why some of us classical liberals fight so hard against the encroachment of the state. Once you accept the concept that the state should take your property and restrict your rights for the greater good, the rest is mere negotiation.