The Anglosphere is a term to describe English-speaking countries. That article makes no mention of Anglo-Saxon being a term to describe British, Americans, or Australians.
There is this on the Anglo-Saxon wikipedia page:
No one inside of the Anglosphere would describe an Irish person for example as Anglo-Saxon. It would be like me calling Argentinians Aztecs.
It really isn't, unless you come from a country where everyone is stupid.
Have you never heard of people describing the anglo saxon model etc?
Are all world leaders stupid?
Edit: Even though it doesn't say white people, when you say britain and so a part of the anglosphere people think white people