Don't judge someone by their appearance

Albeit everyone knows that something is thoroughly different from their appearance, people have still judged what they saw. I suppose almost all people like dogs, but not cats. Dogs have been human's a good friend since ancient times. Yet cats are bad luck or symbol of devil or something like that. Today I have watched a video of a cat protecting a child from a dog. I didn't believe my eyes. An animal,I had really hated rescued the child from the dog, who I had indeed loved and respected. This little incidence has changed my opinion about cats. I don't mean dogs are bad and cats are good. But we ought not to have one track mind.