What is the difference between dqing a contestant because she's transgender and dqing a contestant because she's black?
I can answer this one
because transgender people make some men uncomfortable
a lot of men would not consider having any kind of romantic relations with a transgender person. and since beauty pageants are at their core "would you bang her y/n" it bothers them in a way that having a black woman in would not.
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http://www.youtube.com/watch?v=npHDxSvwCE0