Why does racism exist

The same question has been asked about racism. why? why does this hatred exist. i think it exist because people cannot understand that skin is just tissue. it's just a layer of tissue used to protect your insides. but no. thats not what people want to hear. all people care about is appearences. they refuse to beyond skin. they refuse to see the beauty within. remember god didn't put us on earth to hate. he did not put us on earth to judge. that is not why we are here. got wants us to love one and other ashe loves us. going around judging people is not loving. we are all black and we are all white on the inside.