This question is not as trivial as it seems.
Some people are quick to judge others. They probably know all the answers how to change the world. But in reality, if they knew it, they could explain why is it happening.
So far I haven't found anything at all without a reason.
Things without reason simply does not exist in the real world. Even if a person behaves randomly, does "anything", that anything can be explained and why he behaved the certain way can be explained. Because, let's admit people are always predictable. All your life is more or less decided after you born.
So people cannot be judged, because if you are this person you would behave exactly as he did even though you would not necessarily understand the reason of it.
One thing that can change your world understanding is a computer simulation. You bring in the rules, you see the outcome. And believe me, you often expect a different outcome, and have to feed in different factors.
So before you judge anybody at all, leave a benefit of a doubt. For that, you need to know that things are never as simple as it seems. There's always a hidden reason to it.