It is undeniable that everyone is judging and being judged at every moment. However, what I want to emphasize is that when a person judge another, the judgement is in fact the reflection of yourself, of your values, your thoughts, your inner world.
For instance, what would you think when you see a killer? Do you think he is cruel? evil? bad? Why so? because it is against your values, you think that killing is a crime, is bad, is evil..
But on the other hand, why do he kill? because to him, killing is the only way to settle his problem or to fulfill his needs. that is his value. Further, I wonder if you watch Prison Break before? Or any cop movies? what is the common theme among the criminals? It is their values! Why do a raper still rape people after being released from jail? Because that is his value, he thought it is the 'right' thing to do.. Does every criminal regret of killing? No, NOT everyone of them regret, because to them, it is not wrong!
Will you kill to survive? Will you kill to revenge? Some will, some won't. Whatever it is, that is your value..
When you judge people every moment in your life, think 1st, why would you think so? If you notice that, it shows you your value, what is important to you. It is a great way to know yourself.. Think about it..