Well, that’s the sad fact, under the Nazis, they were initially admired for their incredible nationalized healthcare and education system. That is, until we ended up going to war with them, and finding all the details about the Holocaust, then all that was initially admired about them has been denied ever since. Reality though, is that despite their mass murder, they had the kind of healthcare and education system that most on the left would admire nowadays.
To say nothing of state advocated abortion and euthanasia.
Mass murder can never be separated from collectivism, because it is the root of it. Collectivists of any stripe, to any degree, under any name, are actually mass-murderists. They are people who are utterly fascinated by, and addicted to, the wholesale destruction of human beings. From HOA Boards making rules to harm as many people in the worst way for the most trivial things, all the way up to commendants of death camps flicking their finger left out right in front of a line of people to indicate who lives and who dies, it's all the same - a perverted, depraved and psychotic lust to destroy as many human beings as possible with as much malice and contempt as possible.
And being a collectivist satisfies this in numerous ways, because every aspect of collectivism is based, ultimately and in some way, of invoking that hideous power of mass destruction through the rape of the human spirit.
This is the fundamental "fruit" of collectivism - what it historically leaves wherever it is used. That's why it's always hidden behind ideals of perfection and mercy itself, because only ridiculous claims can distract from its abiding stench of death.
Nevertheless, "ye shall know them by their fruits."