The point made is a perfectly sensible one if you include a bit more context:
> Amid all the battles and conquest, however, Æthelstan brought a cosmopolitan flair to his new kingdom. Today there is a tendency – particularly among the far right – to depict early England as being cut off from the rest of Europe, and homogeneous in its cultural makeup. In truth, the newly formed kingdom of England was an outward-looking society.
> "There's been a big debate about the very use of the word Anglo-Saxon, so much so that people in our field of scholarship are not using the word anymore, and are going towards Early Medieval instead because of the connotations that Anglo-Saxon now has with the far right," says Woodman. "When [the term Anglo-Saxon] is invoked by the far right, they're thinking of it as very one-dimensional – people from one background in England in the 10th Century."
> In fact, that's a big misconception of what the period was like. "It was actually a very diverse place in early 10th Century. I always think about Æthelstan's Royal Assemblies, and there were people there from lots of different kingdoms within England, Britain more widely, from Europe. They were speaking a multiplicity of languages, Old Welsh, Old Norse, Old English, Latin. I just feel [the term Anglo-Saxon] is used without thinking, and without factual detail about the early 10th Century."
> Downham agrees. "There was a lot of cultural variety in the area we call England today. There wasn't this English monolith that started in 500AD."