There is more that can be said, but you may be interested in this previous post, answered by /u/sagathain:

Is the term Anglo-Saxon (or any study of similar scope) inherently racist or anachronistic? Should subjects that study Anglo-Saxons (or other studies of a similar nature) change or not exist at all?

/u/kelpie-cat also has some relevant thoughts in response to As a non-historian, how can I identify accessible, legitimate writing about medieval history without accidentally reading white supremacist propaganda/invented history?