This happens whenever we form an opinion about a person or situation without knowing or considering all the facts. It is the root of all prejudice.

Everyone does it, even Christians. 

It sounds awful, but surprisingly, it can be a good thing.   

As a follower of Jesus, we know that every single person we encounter is a sinner. Everyone you meet is struggling with some issue in their life. And they all need the grace of Jesus along with the love of a neighbor and friend. 

Prejudice is perceived as immoral because it leads to negative behavior. What if you flipped it over, and it led you to become more gracious, compassionate, and loving? 

Every person you meet is harassed and helpless, like a sheep without a shepherd. No matter how rough their exterior or how tough their disposition. They need Jesus and people to show him to them lovingly.

I have already prejudged that I will love others, whether they like it or not.