self-righteous
ADJECTIVE
1.having or characterized by a certainty, especially an unfounded one, that one is totally correct or morally superior.

A self-righteous person acts superior to his peers because he believes his moral standards are perfect. This "moral smugness" is condescending by nature and is usually found offensive by others. 

Self-righteousness is a way unintelligent and nonathletic people can retain a sense of superiority.