I have noticed that too., rdgrad15.

It can be so frustrating.

Unkind behavior doesn't seem to automatically make people unlikeable and less popular. It almost seems like if a person or person is getting their primary needs met in a friendship that they can become blind to someone's faults.

Sometimes even knowing a person's faults won't break up a relationship if it is meeting someone's needs. Maybe this is the case with your coworker? What do you think?

People convicted of serious felonies are often popular in spite of their misdeeds. It is so mysterious why people are quite fond of certain people and not others.

I could be wrong, but I think Insight doesn't always come when it is most needed.

It seems like you have some insight into your coworkers character that your other coworkers lack. Maybe insight will come to your coworkers with time.
Unfortunately I would be the last person to offer you advice since I have been in the same situation and didn't know how to handle it.

Hopefully you will find an approach that works for you for the very best and with the least undesirable side effects. I wish you great, great luck in this!

- Yaowen