The act of being conscientiousness about a topic to the point of being contentious. Being so ardent about supporting one point of view that you vilify someone who doesn't believe as you do.
To behave in a manner opposite to F. Scott Fitzgerald's quote: "The test of a first-rate intelligence is the ability to hold two opposing ideas in mind at the same time and still retain the ability to function."
This behavior is most often noted in people with too much time on their hands.
You want people who are unemployed and broke to get worked up about Men's Rights and foreskin restoration? That's being a little contenciencious, isn't it?