1) The first impression play very important role for everyone to do assumption upon someone. The assumption may be good and sometimes more to otherwise. Many misjudge people they don't really know as bad one. Yes, we have instinct to say the people good, better, the best, bad, worse and the worst are depending on our style of judgement and assumption.
2) From my points of view, when we do assumption on someone before we know him/her deeper is considered unfair. The truth will come after we know his/her background and everything about them. I myself can say this people is blablablablabla but the truth is contrasting from reality.
3) The best way to avoid misjudgment is knowing the people very well before we say something.
4) This is the common issue that people always do. The other issue is when a person look down on others even though they have known deeply each others. The feeling of untrusted to the people we looked down was totally unfair because their thoughts and understanding upon something were not in line with us. They might have their style of thoughts but the objective are same. The thoughts of implementation are different but both focused to get same result. Meaning to says, this people used this method of calculation to get equal ten: a person said 5+5=, the other person said 4+6=? Both have same objective/result. The situation worsen when someone couldn't accept that their method of calculation rejected; their thoughts are putted aside. Only this method considered correct and the rest wrong. How unfair is it?
5) The feeling of looking down on someone I mentioned above is not accepted because we never give him/her any chances to prove themself as the best. They have rights to correct the bad judgement if they are given chances. Everyone was granted with different expertise and the way we use minds to solve matters. It is unfair if we simply judge a person without any consideration. So, don't do comparison who is the best and the best is given full attention with high respect. The treatment given should be equally.
6) I observed this habit rampant exercised. Please realise that we all have feeling to be treated equally with no bias. Remember that you and I are two different actors who have different style of thoughts. Hence, you won't be me and I won't be you forever.
7) I'm not going to prolong this to many more words. But, my stand is we are human beings - we must respect each others. Do not ever look down on others by comparing ourselves are the best. We were created with different style of thoughts. Don't judge a book by its cover, have a great journey from many pieces inside, there must be interesting story, insyaAllah.