If in any way they get a clue that the candidate has his views and perceptions or convictions breaking the interviewer's perception and conviction on the same matter, then there will be an involuntary reaction to reject or disfavor the candidate or to probe further deep to be sure of it.
I guess such a thing occurred in one of my early-day interviews. That was for a management-level post. I was asked to mention one unique point about Kerala, my native state. Very promptly I answered that it was in Kerala that a Communist government came to power through the ballot. It was a fact. But then I had an intuition that they did not relish it. Probably they would have considered me as a trade union-minded fellow and a threat.(This is my guess only). Then they asked me why more people from Kerala are going to the Gulf states for jobs? That was some indication from them. That made me guess that they disliked my first answer.
'Idhuvum Kadandhu Pogum "
Even this challenging situation would ease
Knowledge is power.
In government organisations, there will be many issues. They may not worry much about the capability of the candidate. They may have many other considerations like the known candidate or a candidate who may bribe the board members to see that he will be selected. Such people will have a bias towards such candidates and try to eliminate all other people showing something or other as a negative trait. They try to disqualify other candidates by troubling them in the interview.