If there is something to be learned from movies featuring aliens is that they always plan something and their plots do not exactly match the mankind’s "keep on living" schedule.
Evil can be defined as the intent to violate certain rules, laws and procedures. It is also a deliberate wrongdoing, designed to hurt others. In his book, Beyond Good and Evil, Friedrich Nietzsche argues that the natural functional non-good have been transformed socially into the religious concept of evil.