Why is my dog racist and only barks at black people?

When she was a puppy, I had an apartment break in. The robber was never caught but they only took my TV and PlayStation. Now she’s older and only barks at black people. It’s literally only black people. Whites are fine. Hispanics or Asians fine. Blacks are not fine. It’s embarrassing.
Why is my dog racist and only barks at black people?
Why is my dog racist and only barks at black people?
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