Read the book Axum written by richard allexander
I never take Xabashi sources they lie about History their narrative is full of fairytale if i want to read a book about African history i read academic books written by Europeans who did enough research.
Zagwhe were a bunch of Agaws with the rise of islam axum was going down and the Agaws were rising , it is said that in the mid era of axum the Tigray people started developing Tigrinya language and were turning away from geez