I know what’ll settle this, I’ll quote from Wikipedia!
“An ethnic group (or ethnicity) is a group of people whose members identify with each other, through a common heritage, often consisting of a common language, a common culture (often including a shared religion) and an ideology that stresses common ancestry or endogamy.[1][2][3] Another definition is “…a highly biologically self-perpetuating group sharing an interest in a homeland connected with a specific geographical area, a common language and traditions, including food preferences, and a common religious faith”.[4]
Members of an ethnic group are conscious of belonging to an ethnic group; moreover ethnic identity is further marked by the recognition from others of a group’s distinctiveness.”
Wikipedia votes yes, they are.