Reaction of Americans when a Muslim is mistreated due to racism or discrimination .
Racism involves the belief in racial differences, which acts as a justification for non-equal treatment (which some regard as "discrimination") of members of that race. The term is commonly used negatively and is usually associated with race-based prejudice, violence, dislike, discrimination, or oppression, the term can also have varying and contested definitions. Racialism is a related term, sometimes intended to avoid these negative meanings.