Yeah, to add on jotabe said, there have been studies with babies showing that we actually are born racist, if you want to call it that. (Basically, the studies show that once babies reach 3 months, an age where they can discriminate between what their care-givers look like and other types of people, they have a harder time recognizing and reading facial expressions of people of other races.)
I agree that empathizing with out-groups has to be learned, rather than being innate.
A secular form of "original sin", so to speak. How interesting!
These studies were featured in a Time cover story at one point, if I remember correctly.