The persecution and vilification of other groups is a natural consequence of being an ethnonationalist. DHH also does this, of course, as he paints a false narrative in his blog text that brown people are dangerous.
Identifying with your tribe is a completely different idea. Your tribe (or nation) is not defined by ethnicity, but by culture.
If you believe a cultural identity should be tied to the political state, that's called civic nationalism. Most countries were founded on some form of nationalism during the 1800s, so you're onto something there. These were ideas that grew out of the German idealist philosophy, and it's no coincidence that nationalism in Germany eventually developed into the ethnonationalist Völkisch movement, which was the precursor to the Nazi party.
---
The English culture _is_ the Anglo-Saxon cultrue, so the Anglo-Saxons couldn't have replaced them yes, but only because no such group as the English existed before the Anglo-Saxons arrived.
"the Anglo Saxons did not replace the native English" is a ridiculous statement on multiple levels. You've outdone you previous self-contradiction speedrun, now the contradiction is in the same sentence.