Most of the times we judge people and things without having any second opinion or thought about the fact, not just sometimes, we always do that. One of my teacher taught me that before judging someone, first do analysis, observe, and then make a conclusion. We can't judge someone's mentality, age, religion, purity, region, character, morals or anything by the very first impression. If we read a name of a book then are we able to express the whole story of it? Absolutely not. So in the same way if we make a conclusion about someone's life or personality then we shouldn't do it on the very first sight.
It happens often with me that when I want to write or talk about something then I'm not always able to express the points and the story that flows in my mind, sometimes I do write things that can be understood by me only, because I know the real facts and main story behind it. It means that we're not always able to express ourselves, so we should not judge and criticize on the very first impact of someone. It might happen that the other person is right and you're wrong, maybe he couldn't define himself that moment, maybe his beliefs are more stronger than yours, maybe he got real experience of a thing that you just observed. That's why all the intellectuals and wise people say that don't make hasty decisions. I hope that before judging someone so deliberately you'll think about it.