Why was Jean yelling at Rick in their house?

Jean yells at Rick because he doesn't take her seriously when she says she wants the locks changed.

Rick: You've had a really tough night. I think it would be best if you just went upstairs right now and...
Jean: [Interrupting] And what? Wait for them to break in?
Jean: [Yelling] I just had a gun pointed in my face!
Rick: [Agitated] You lower you voice!
Jean: [Yelling] ... and it was my fault because I knew it was gonna happen. But if a white person sees two black men walking towards her and she turns and walks in the other direction, she's a racist, right?