Over the past years, there has been a huge rise in movies and shows about an apocalypse happening on Earth, and a small group of humans having to survive in a scorched-Earth scenario. Movies have been showing us bombs raining down on the planet, while whole cities are being wiped off the map.
Similarly, over the past decade we seem collectively fascinated by aliens, yet they are rarely portrayed as wise, compassionate beings. In most media, non-terrestrial intelligent species are shown as violent and manipulative, here to use Earth and its resources for their own gain or to enslave and exploit humanity.
These themes are popular not because they reflect rational fears about the future, but because they touch something much deeper.