Have you been discriminated against because of race? I haven't.
I was once interviewed for an unemployment counselor position with a state agency. When I went for the interview, I noticed that all of my future coworkers has several traits in common. About 9/10ths of the staff were women, about equal representation of white, black and Hispanic. The remaining 1/10th were all black men. If there were any Hispanic men, I did not see them. I realized that if I got the job, I would be the only white male. That would be very strange in an office of over 100 employees.
The interview went very well and every person that interviewed me and in the supervisory positions were women. I received a call the next day offering me the job. When I accepted, they indicated they would call back in a few days and give me a start date. A week went by and no call. Finally, at the end of the second week, I got a call back, saying that the director had decided that the staffing was sufficient and they would not be adding any more staff at that time, but if an opening occurred I would be called to work with no need to reapply or re-interview. That was the last I heard from them. It was a good thing I did not give notice at my current job!
Now, why do you think the job magically disappeared?