I didn't say they were Black and I haven't seen any of the academics claim that either. There are well over a billion people in the world with dark skin who aren't Black. Most South Asians, Indigenous Australians and Melanisians have dark skin, and so do many Amerindians, but they aren't Black.
The papers on European genetic heritage that I read in the past all pegged the Hunter Gatherer DNA as a minor compoent but it depends on which European group you are looking at, with some having minor contribution and others have substantial. I don't have links to the papers at hand right now so just working on memory.
This Guardian paper, which obiviously is not an academic article but is reporting on academic papers, has the H-G contritbution of some European groups as substantial, like 40- 50%. I don't recal such high % from the papers I read many years ago.
Mixture of hunter-gatherers and farmers was augmented by third wave of migrants, perhaps 5,000 years ago, from north Eurasia
www.theguardian.com
The below paper in Nature is the newest paper on paleolithic Europeans, but it does not look at the % of H-G contribution in modern Europeans.
Combined analysis of new genomic data from 116 ancient hunter-gatherer individuals together with previously published data provides insights into the genetic structure and demographic shifts of west Eurasian forager populations over a period of 30,000 years.
www.nature.com