When will people wake or be told that Thomas Mayor isn't a first...

When will people wake or be told that Thomas Mayor isn't a first nations person as per his ancestry.
By his own statement, because he was born here to foreign parents and lived in Darwin and the Torres Straits it make him a first nations bloke. So by his own statement everyone living here is a first nations person.
Why doesn't Linda Burney raised by her Scottish family yet not recognise her 50% Scottish heritage.
She didn't meet her father until she was 28 years old. Poor under privileged person , never lived in the bush.