There must be a reason you feel this way. Acknowledging your feelings is admirable. Now you need to explore why you feel this way. I usually comes from something in childhood. Were your parents predjudice in any way? Did you see something a young age that traumatized you.
I remember one assembly my sister and I saw a large black woman beating her kid in the bathroom. I don't mean a few swats on the butt either. This lady was out of control. Someone reported her, rightfully so. It was very sad. We were older but I imagine if we were young it could have left a lasting impression. Other than the impression that that woman was crazy.