How do you deal with an insensitive CNA?

She doesn't need to be fired. She is used to having her way. Maybe this new nurse can speak with the CNA about her behavior. Then if she continues she can report it to her manager. Then it is up to the manager what is done. Wow, i'm glad that i don't work with any of you all. You guys are quick to want to fire some one.

Thank you all so very much for your replies to me. I'll tell you haw this went. When I got in yesterday, I requested a meeting. Another staff nurse was in charge, so she called the Director of Education in for support. (This is not the first time a nurse has had trouble with this CNA.) I took the CNA to her office and sat her down. She was really nervous, and asking questions, which I refused to answer. When we got to the door, I said, "I want you to remember that I love you."
The Director of Education let me say just what I've told you, and let her defend herself on each point. The DOE sided with me, and told her that we don't do reality orientation. The CNA denied laughing at the resident, and denied saying to her, "You're family brought you here and left you." I told her that that is what I had heard, and that I never wanted to hear anything like that again. My voice was very soft. The Lord was helping me.
I brought up the issues of her challenges to my authority. She attacked me back. I apologized for what I did that she perceived as rude. The DOE took up for me, and reminded her that I was the supervisor.
The shift went along nicely. The CNA was smiley and sweet as an angel. The other CNAs did what I told them without giving me trouble or running to the CNA who thought she was in charge to get it changed. I was able to focus, and get more of my work done. It worked out well, and I'm so glad the management supported me.