"But I disagree with him when he postulates and preaches about colonizing Mars," Herzog says.
"And I have to tell not only Elon Musk, but everyone. And so I say it as straightforward as it can be... it is an obscenity. The thought alone is an obscenity."
Herzog compares Musk's utopian vision to that of communism and fascism. Herzog says the 20th century was "in its entirety a mistake," which brought "the demise of great social utopias" like communism "as being the paradise on earth."
"No, it failed," Herzog says. "Second failure, fascism, Aryan master race will dominate and improve our planet Earth and really improve humanity. Thank God, both these gigantic utopias were brought to an end."
The same will happen to Musk's Mars city, Herzog predicts.