Why cant we treat eachother like the human beings that we all are

I mean why do we have to divide ourselves by color or ethnicity as different races , we are all the same race " human beings " for God sakes people lets end this racism bullcrap and just start treating one another like fellow human beings that all bleed the same color we all have the same basic anatomy in a way we are all the same we just look different in skin color based on our environment / where we live on this humungus planet called earth that we should learn to share as one race , " human ". That's all we need to do is just realize that we are all one race , one in the same as humans / human beings / earthlings ,the real BIG QUESTION is are we really all alone in this endless universe , or are there truly other races out there on some distant planet in another solar system , I mean just Imagine if there were really other alien races right here on earth living among us , would we then realize that we are the human race and they are so different from us as to be considered a whole different race.