Dichotomy

(from Websters)
Dichotomy: division into two especially mutually exclusive or contradictory groups or entities ; also : the process or practice of making such a division

From a recent story on both documented and undocumented workers losing jobs in the Park City, Utah area as a result of the economic slump. Such a big issue with strong opinions on both sides. Read Deseret News' Aaron Falk's story here.