Greta Thunberg - Question of Sámi ancestry

Her tree on Geni dates back to ca 1500 and includes no Sami profiles. So if she has some Sami connection it must be from before the medieval time and undocumented.

Well, - how do you identify sami profiles?
I doubt anyone can

I suspect somehow (knowing social media) that it's not intended as a compliment, and it's more likely to be based on the shape of her face than on knowledge of her ancestry.

There's no way to tell that a profile is not sami - lots of records don't show the distinction, and even those that do distinguish are strongly influenced by whatever politics were at play at the time (how powerful the discrimination against sami was in that particular year, and how interested the census-taker was in either calling out sami to be ostracized or suppressing their identity in order to "integrate" them).

Some profiles clearly show the person to be called out as sami in their own time; we can prove presence, but it's hard to prove absence.
The furthest north I could see in a quick ancestry report was Örnsköldsvik, which is as far north as the centre of south Sami culture in Sweden (Östersund), but it's on the coast, which tended to be dominated by ethnic Swedes.

I doubt we'll find anything.

Thanks so much for that very clear explanation, Harald.

Interestingly, the comments have not been from her detractors, but rather indigenous supporters in the Americas and Australasia who thought she might also be from an ethnic minority group. I figured it was wrong, but I knew nothing of how Sámi genealogy works and wanted to double-check. I understand better now!

Thanks for the info on where the comments come from!

There's a lot of resurgence of Sami self-identity over recent decades (see Norway's Eurovision Song Contest contribution this year, for instance), which leads to a large number of people wanting to find their Sami roots (if any). So more people than ever before in modern times are "sami and proud of it".

The treatment of the Sami population by the ethinic-majority society up to at least 1960 (probably 1970) is nothing to be proud of.