Equality

If God made us equal and He can love everyone one of us unconditionally, so much that He was willing to give His only son then why are we building walls around us instead of bridges towards each of us? Why are we creating ranks and social hierarchy?  Why does some of us feel the right to believe they are better, wiser and superior to others then the rest of us? Why cannot we live according to what Jesus taught? The answer may be easy, but in the same time heavier then you might think. We are all the same, "made from the same material". Those distinguishing marks which are making us different are due to the climate of the place we are living. Why cannot we understand this? Why do we have to fight all the time to be better, wiser, to achieve more then others? Why can't we simply accept the fact that we are good at one thing and others at another thing and that is all right, that way we complete each other? Questions which appear all the time though they shouldn't reappear.