Well, of course.
Communism killed tens of millions of people. Fascism killed tens of millions of people. Yet, people continue to push for ideas that will contribute to the creation of similar systems of goverment.
Why? Because they view, say the people of Russia or Germany from sixty years ago, as semi-fictional, foreign, less enlightened, essentially dumb masses who are quite unlike the people of today.
Prohibition in the 1930s? Funny how all these things occurred around the same time. Don't we all know that people living in 1930s America wore silly clothes and hats and were full of all kinds of stupid and ignorant thoughts and beliefs? You see them on film and they all work around really fast in a kind of silly way in a silly non-advanced world. Why, they're nothing like the great minds we have roaming the world today!
The message seems to always be the same: we're going to repeat the mistakes of history because we're better than everyone else. Those who disagree with us are ignorant and hopelessly unenlightened and need to be led. The mistakes of history are, just that, history. We're smarter and we can do it better.
Prohibition is inevitable, because you have to understand, the people who make such decisions have a funny tendency that no group of people in the history of the world can lay claim to: they are absolutely, positively correct in their view and they have never been wrong about anything. They're right about smoking and secondhand smoke, they're right about global warming, they're right about food and nutrition, they're right about all of the metaphysical questions, they're right about the political framework that should be imposed. They're right about everything! 100%, absolutely, all the time.
Disagree? You're not thinking clearly. Something's wrong with you. Really, they don't even want to speak with you.
When it all plays out, they'll just do a better job at genocide.