Nationality is the country you were born in or the country in which you presently live. The land you were born in defines your nationality. That is why anyone living in America can say they have American pride. You can choose to alter your nationality, but not your race. Race is a grouping of people into different categories of physical appearance.
The most common of which is their skin color. It could also be hair color or texture or the shape of the face. The word race has unique connotations because of the history of how the blacks fought for freedom in our country. It could also be bad to refer to discrimination in our society.
The belief that one race is superior to others leads people to behave in a certain way. Also, people from the same race tend to have come from specific places geographically.
"Races" are not as many as the nationalities; they are a description of a person that can have a number of features (for ex. color of the skin, the form of the eyes, the color of eyes and hair, etc.). The main races are Caucasoid (White), Negroid (Black), Capoid (Bushmen/Hottentots), Mongoloid (Oriental/Amerindian), Australoid (Australian Aborigine, and Papuan). Nationalities instead can be way more; they are a legal description. If a person was born in Canada, for example, it means that its nationality will be "Canadian".