Racism an the uncanny valley?

It freaks me out when racists keep posting up pictures of ape-ish looking humans an compare them to black people a man who is black or darker skin doesn't look scary because my brain automatically registers them as human but the offensive pictures that keep getting posted up makes my brain disgusted because it doesnt register it as human but a fake human that makes me feel scared why dont racist peoples brains work right an just straight out notice the diffrence why cant it just register like a normal human instead of trying to portray them as a monster they arent an stop putting up those creepy picture seriosly whats wrong with them its like if someone started posting up a bunch of white people making them look like the freaks from the hills have eyes but covered in grease its just freaky looking an has no resemblence to the real thing