How can it be innate in some nationalities but not in others? You're either born with a gender identity (that may or may not match your sex, you've claimed), or you're not. Spoiler alert: you're not, nobody is.
The idea that toddlers in nappies would know they are not boys but girls beggars belief.
How is it rational argument when you write this stuff? If you decide to critique a post, do at least to attempt to what is written rather than what is not.
Nobody has said that gender identity is cemented into a reality that they can be articulate by toddlers in nappies - though it may be true in some cases that already by the age of being a toddler some children might begin to have some sense of it. Nobody is saying that the best evidence comes from child's play; in fact I have mocked the very idea that this can be part of a diagnosis at GIC, yet you persist with this strange narrative.
It is obvious that your thoughts derive from a place of bigotry, you needn't trouble to reinforce the point within every post as you've made it plain enough.
The basis of diagnosis is to try to establish a pattern of recurring expression of gender incongruence over an extended period. The problems as I see it is that the so-called diagnostic process is just a list of closed questions about what your favourite colour was when a child and what it is now, and what toys did you play with. For a start, an only child will play with the toys provided by adults with certain expectation.
I well remember my niece coming out of each appointment disgusted by the frivolity of it. Out of the battery of 40 questions asked, eight were about pretty colours and toys, and 32 were about masturbation. On the back of asking these same questions on each visit a diagnoses is made. The trick that 'patients' learn is to find out from other what the 'correct' answers to the questions are and dimly rattle them off.
The whole exercise is a complete waste of time and money. This is why I support the Scottish proposal. It may be less than perfect but then every system is. At least the Scottish proposal shortens the time from 24 to 6 months, drops the faux diagnosis nonsense, and instead looks to filter out rogue cases - much more sensible.