There's something about her behavior that i couldn't find the right name. It's not only her fanatism and bigotry.
Xe'ra is a white right Light supremacist.
For her only things Light are pure, good, have the right to exist.
Loyal Alleria studying the Shadow? Lock her up.
A baby who didn't make a single decision, who didn't show the least sign of what his character is, is born with golden Light-like eyes. Chosen one.
Curse you Xe'ra.