Swissgemma if in fact you are not hard of thinking, how can you write things like 'talks and eats as a female'? What the hell does that mean?
Also, if you accept that gender, not sex can be changed, and that gender is the way people perceive themselves (and apparently talk and eat), then what is the justification for segregating based on gender?
As for the race, that's nice, but I am sure that the millions of black people in this country who have been subjected to racism and prejudice as a result of their skin colour would disagree with you. I would guess that you are white (and live in a bubble). If you were black, or had any capacity for critical thinking, you would realise that no amount of 'identifying as white' will stop a black person experiencing racism. Same as no 'identifying as male' will stop me being perceived as female or from suffering sexism or sex-based violence. My sex is a material reality, as is my skin colour. Neither is a feeling or a personality.
The point is that if you allow dominant groups to identify into an oppressed group, you impact on the oppressed group's rights and interests. It is not right for a white person to take a scholarship intended for a black person and nor is it right for a biological male to take opportunities that were intended for a biological female.