Implies that one branch or denomination of Christianity is superior to another. Nationalists, on the other hand, declare America to be a Christian nation, but scrupulously avoid sectarian or religious tests which open old wounds or breed religious strife (also denominationalist). Nationalists avoid "holier than thou" religious attitudes which tend to divide or demean Americans; instead, they maintain a reverent attitude.
a narrow-minded adherence to a particular sect or party or denomination; "he condemned religious sectarianism"
A strong or excessive devotion to a particular form of religion, often leading to a resolute prejudice against other beliefs.
the reinforcement of divisions between religious groups
Sectarianism refers (usually pejoratively) to a rigid adherence to a particular sect or party or religious denomination. It often implies discrimination, denunciation, or violence against those outside the sect. The term is most often used to refer to religious sectarianism, involving conflict between members of different religions or denominations of the same religion.