This is not claiming that half of European men are descendants of King Tut but that they have a common ancestor. There is a big difference.
It is even more interesting that less than 1% of Egyptians do not have a common ancestor with King Tut. This indicates that when the Egyptian civilization fell that those who took over the area almost completely killed off the previous residents who remained. Basically, only those who escaped from the area survived. Those who took their places only pretend to be the descendants of those who built the pyramids etc...
We can expect the same type of treatment from those the Biden administration has been importing into the country to replace us. Two thousand years from now they will be pretending to be descendants of those who formed the United States.
In general, the Egyptians are most similar to other Levantine (Middle Eastern) and North African peoples. Modern Egyptians appear to have 8% Sub-Saharan African DNA than ancient Egyptians (but some of the calculations are based on a small sample of ancient mummies).
This has become politicized in this country because a lot of people, especially black Americans, claim that the ancient Egyptians were black. In this country anyone with known sub-Saharan African ancestry is considered black (Hispanics excepted), even if it's half or less than half of their ancestry. Egypt was a transitional country--probably we would have seen a lot of people we would consider black in that sense but also a lot of people we would consider white.
A Roman official in Jerusalem mistook St. Paul for an Egyptian--so to him Egyptians were not necessarily black.
People have been migrating around the world since the ice ages.
Maybe, if it keeps getting warmer we all will move north to Edmonton, Calgary and Labrador. All the decendents of the people on Martha’s Vineyard will be fighting over Ocean Front property on Greenland and Newfoundland.
Or, that part of the royal lineage was European and not part of the wider populace.
I don’t know about the 1% figure, but King Tut lived over 3000 years ago and that’s a lot of generations. Ancient Egyptians had more interactions with people in the Levant. Modern Egyptians have more descent from Sub-Saharan Africa. Massacres aren’t necessary to explain the change. The history of the Coptic Christians also suggests that the change wasn’t brought about by exterminating the earlier inhabitants.