Answer:
Racism makes people feel sad because they are getting bullied for their skin colour or nationality.
From the racist's point of view: it may make them feel superior to other human beings of another race, or feel as if they are upholding pride within their race and therefore fulfilling some duty.
From the one being discriminated against point of view: it may make them feel lowly and hurt their self esteem, or make them angry enough to either start a cause against racism or may make them racist in defense of their race.