When you taste things in the right order, sometimes they taste so much different than if you taste them out of order. Not that there's a right order, like by rule, but just like in a thoughtful way that makes sense.
The Alien is gross, scary. There is something in a human being that looks at them and sees it as a cockroach. You can never feel nurturing towards the cockroach.
When an individual, a sect, a clique or a nation hates and despises another individual, sect, clique or nation, he or they simply do not know the objects of their hatred. Ignorance is at the bottom of it.

