Some people don't think black people are really people. Both types of person are wrong, and their opinions are without merit.
This is fundamentally, scientifically, and medically incorrect.What's in between their legs is what their sex is. Anything else is just a belief.
To make matters worse for you, it also directly contradicts your position in this thread, since it would argue that transgendered people after SRS are the genders they identify as, which you were disputing.
That's not why that's their gender, however. Just pointing out the hypocrisy.
You can't be arrested for refusing to show your papers. The USA isn't a fascist police state.