Foxy said
"Anglo Saxons make up 10-40% of DNA in nearly half of all modern Brits"
No you misread that:
"The majority of eastern, central and southern England is made up of a single, relatively homogeneous, genetic group with a significant DNA contribution from Anglo-Saxon migrations (10-40% of total ancestry). This settles a historical controversy in showing that the Anglo-Saxons intermarried with, rather than replaced, the existing populations"
"But basically the findings suggest that the most "indigenous" people in the UK are not the English, but the Welsh"
This is correct, but all native Britons are nevertheless largely indigenous with Anglo saxon admix affecting only those people whose ancestry lies in parts of England.
And bear in mind that the Anglo saxon migrants arrived well over a millenium ago and when Britain and most of Europe was still tribal. How far back would you demand people go to prove isolated ancestry in the same homeland in order to "qualify" to call oneself 'indigenous?
God only knows what migration wars and admix was going on in the New World a thousand years before first contact or how long any of their tribal popualtions were "isolated" without admix. In fact while Indigenous American genetics are a fascinating subject its also become a VERY thorny issue
"To many tribal people, having a scientist come in from the outside looking to tell them where they’re “really” from is not only uninteresting, but threatening. “We know who we are as a people, as an indigenous people, why would we be so interested in where scientists think our genetic ancestors came from?”"
Understandable that they are worried when people like you want to set the bar of 'purity' and settlement so high that they may not "qualify" either!
The racism is coming not from those who demand our ancestry be acknowledged and respected but from those who have an agenda to devalue it, and deny that right.