When did I become sectarian?

I have been accused on other blogs of being "sectarian". I never thought of myself as sectarian, but I don't know anymore. Maybe I am sectarian? Or am I racist? What is "sectarian" anyway? Does one become sectarian when one identifies with one's sect after seeing horrible violence repeatedly inflicted on the people of that sect? Is my sectarianism a result of my interaction with Sunni Arabs on other blogs? Or is it a result of what my family experienced in Sunni Arab-ruled Iraq in the 1980s? Do I hate? Am I mean? Unstable? Did I change while reading The Shia Revival? How do you see me?