Excellent point. This is really an example of what these leftists themselves would like to do. They figure since they feel this way, that any advanced alien life form must as well.
As I said as well - I am sure the left-wing would join the aliens in their attempt to genocide mankind.
Alien 1: Hey everyone! I just got this white paper on AGW from Al Gore!
Alien 1: Let’s roll!
Reminds me of this ad I saw on the NYC subway for the Guggenheim. NYC reimagined, with far, far fewer buildings, which would mean far fewer humans. I was completely disgusted with it.