People see there gender, race and political beliefs as boundaries between the same and different. For example, a women who is a business women may not always see sports such as football as an important or exciting thing while on the other hand a sports fan either male or female might think that football is very exciting nad important. The point that I am aiming at is that the way a person functions on a daily basis usually effects how they view different aspects of life. Of course there are some exceptions. When it comes to bigger issues such as race or gender these issues become more serious and sometimes interfere with personal relationships.
Some people are racist and see the color of ones skin as the most important thing one has to offer.
This behavior is usually learned. Political beliefs are usually learned as well.