Horror has a face; it can be seen in the memmory, rewinded and repeated over and over again. Whearas Fear does not. Fear refers to the speculations of the unknown. A glimpse towards the dark, which may be in the form of one's own imagination. Fear is one's own discrepencies, which are projected onto the screen, as they are filtered through the lens of one's observation. Hence, we sterotype!
Animals communicate; so do humans. Earlier relying solely on the subtle gestures, and body language. Where every move is translated onto a slate of meaning, which is hardcoded in the animal's own instinct. The naturally derived hypothesis being that the other animal has the exact replica set of instincts, actions, and perhaps emotions. Then, sterotyping is not a human instinct, consequently.
Humans, when following animals in their footsteps, try to find meaning in the non-intentional or perhaps very diverse gestures of the opposite person. It does seem bruitish, however, that humans neglect and fail to trust their most accomplished achievement in the history: Language. The psudo-scholarly spins the nature of the brutish action under the label of "diverse human interaction", and sometimes "Wisdom" (,which they define as pre-judging the future before happening on the basis of what has happened before. A cruel form of sterotyping). But they know it too. They know that bypassing the language is from fear. A fear of clarity, that may be unleashed over the matter, if they communicate in words. A fear that it may lead to Horror.
Lead it may to horror, but never will to the horror of existance. Life in its purest and innocent most form is the set of events. One must experience these events to find meaning to their existance, and consequently realization. Horror has a face, but fear does not: the fear actually destroys any face like acid on skin.