Leftist can't learn. They're still rationalizing the mass murders and catastrophic failures of collectivism, still insisting that it really does work, and it will succeed if it ever gets a proper trial. A century wasted in war and tyranny, more than 100 million dead, countless others enslaved or displaced or broken, and collectivism still hasn't been given a fair shake. We can't teach these people or reason with them or humor them. We can only keep them out of power and away from sharp things.