Here is an interesting hour long movie with a realistic quote: [View all]

[Jeffersons Ghost]

Well no, according to the eminent physicist Stephen Hawking. "If aliens visit us, the outcome would be much as when Columbus landed in America, which didn't turn out well for the Native Americans," Hawking has said in a forthcoming documentary made for the Discovery Channel. He argues that, instead of trying to find and communicate with life in the cosmos, humans would be better off doing everything they can to avoid contact. https://www.theguardian.com/science/2010/apr/30/stephen-hawking-right-aliens

Stephen Hawking (shown here in 2008) has been vocal about fears that an advanced alien civilization might wipe out humanity.
Credit: NASA/Paul Alers

Since at least 2010, Hawking has spoken publicly about his fears that an advanced alien civilization would have no problem wiping out the human race the way a human might wipe out a colony of ants. https://www.space.com/29999-stephen-hawking-intelligent-alien-life-danger.html

Here is the interesting Science Fiction movie, on the same topic, which originally appeared on television.