@QasimRashid Racism is hereditary, meaning it's passed on from parents to children.
When a child is raised by racist parents, and taught to be afraid of a certain race or people with certain characteristics, they have built-in autonomic responses.
For example, In the USA, when an adult white person, raised by racist whites, sees a black person, they have an automatic fight or flight response. They come full alert, blood pressure rises, adrenaline in released. It's autonomic. There's no thinking involved because it was engrained in them as a child. "This is danger!"
So insane behaviors like this should not surprise anyone.