Racism is belief of superiority over one's race race or enthnicity or prejudice agaist someone of different race based belief one's race superior .
racism is abnormal . it is illegal for people to treat you different because of your race or ethnicity.
we should not be judge by our skin colour but by the content of our character.
To be sincere , things that Unites us are much greater than things that brings division.we are one race , homo-sapiens, human beings.
all our blood are red . our blood contains red blood calls, platelet and white blood cell. show they is no difference between us . and one God created us all.
but am happy that today even the United nations propose that we are one "All human beings belong to a single species and are descended from a common origin".
it does not matter whether you are black or white.our colour does not have effect on our character or our ability for example in football they many black and whites who performed at highest level like Paul pogba(originated from guinea ), michael essien (ghana international ) Jerome boateng (originated from ghana) they are successful in Europe and their skin colours have no effect in their perfomance .
we should start to teach the younger generations that we are one race . so that the word racism will be alleviated. 
my advice is this
WE SHOULD JUDGES SOMEONE BASED ON THEIR
CHARACTER. OUR RACE DOES NOT DETERMINE OUR ATTITUDES. .......WE ALL CREATED BY GOD