Sectarianism (noun)

1. The state or quality of being sectarian, or of adhering to a particular sect or religious denomination.
2. Exclusive devotion to or intolerance of a particular sect, religious denomination, or group, often characterized by a lack of toleration for differing beliefs or practices.

Origin:

From the latin word "secta" meaning "faction" or "sect".

Examples:

1. The sectarianism between the Sunnis and Shiites in Iraq has led to violence and political division.
2. The school was founded to combat sectarianism and promote interfaith understanding.
3. The politician was criticized for using sectarianism to gain support from certain religious groups.
4. The sectarianism in Northern Ireland has been a source of conflict for centuries.
5. The rise of sectarianism in the country has led to a decrease in religious freedom and tolerance.