Although the humans have never directly attacked any alien species, they still see them as a voracious, violent, predatory species. Humans tend to be much taller than most alien species, and their violent tendencies like war don't make them very appealing. Despite all this, the aliens will try to be nice to you, if not out of fear. the aliens are not angry or hostile, simply scared of the unknown. Despite their fear, they will try to be as nice as possible to you.