Why is the "I" in "Indigenous crisis" capitalized?

It's similar to the use of the words Aboriginal and Squatter in Australia.

The word aboriginal with a lower case 'a' means 'indiginous' or 'original inhabitant' but 'Aboriginal' with an upper case 'A' came to refer to people descended from the indigenous people of Australia {with all the attendant bias and abuse that accompanied colonialism}.

The word 'squatter' with a lower case 's' on the other hand means someone who occupies a property or piece of land either illegally or without legal title of any sort. However the word 'Squatter' with an upper case 'S' has come to mean a large, wealthy landowner. I understand that 'Squatter' meaning a landowner is often written with a lower case 's' but whenever 'Squatter' appears in the middle of a sentence it will refer to a large landowner, not a homeless person occupying a building illegally.

It's capitalized to indicate a specific group of people, i.e. the "Indigenous" Maori's. "Maori" also capitalized as to indicate their race of people are "Maori".