No point in arguing

Two people feel strongly about an issue, their feelings come first, and their reasons are invented on the fly to throw at each other. When you refute a person's argument, does she generally change her mind and agree with you? Of course not, because the argument you defeated was not the cause of her position; it was made up after the judgment was already made.

From The happiness Hypothesis, Jonathan Haidt

I think most of the people make up their mind in a second on the first impressions and after find some reasons to justify what they already decided to do. Lesson? Make a good first impression.