Humans are a warring race, we always have been, but hopefully we will not always be. Humans have attacked and/or killed just about every living thing on the planet, including each other at some point. So that may explain why we humans are so afraid of UFOs. Maybe they will behave similar to us therefore creating imaginary danger. At some point that fear needs to give way to science and you can learn more in this nicely written article by author Leslie Kean writing for The Debrief, HERE.