We'll never know the real cause, as there is a lot of uncertainty surrounding these types of finds in human DNA; the definitive evidence has long been lost to the ravages of time. At best there is room for speculation and no concrete answer to be found.
Yeah, it's total clickbait, but I didn't think it would be bare minimum decent to include actual information (admittedly too late at the end). I couldn't be bothered to give them the view, I ended up hiding the source channel because it was pumping out a lot of slop and clickbait.