How do you deal with a racist Mother in Law?

my mother in law is from mexico and hardly speaks alot of english. I married her son who speaks fluent english and spanish. She has always been nice to me but I came to find out that her niece got killed by a her black baby's father 8 years ago. This has made her despise african american people. I am African American and I can understand spanish when it is spoken. She has asked me to look for her a new house in Chicago and im unfamiliar to any of the areas but whatever looked nice I set up interviews with a real estate agent. We went to a house and she saw one black person and she just starred and when we got in the car she was telling my husband/ her son in spanish "hell no im not moving here this is the black neighborhood, i never wanna live around these people all they do is steal and they cant be trusted." It hurts me because I am african american and 8 months pregnant and I don't want her putting in our daughters head that being black is bad. Honestly some of the black people here are "GHETTO" and it upsets me because I hate that's what Im ociated with. We went to the mall and there was 2 black girls being loud and ghetto in the bathroom cursing and being just rude!! I didn't leave the stall but when they left a latina and a white lady was talking about how black people have no manners and going on and on about how they are tearing the city apart. I was embarred to leave the stall because I didn't know what they would say to me or how they would look at me. I am a well educated African American girl, I was raised around a diverse group of people but Why my people? Sometimes I hate being black when I see how messed up they are and how everyone here stares at me because I am black with a Mexican. How do I deal with this situation?