What you telling me here highly contradicts the present reality.
1- Every Eritrean i met refuses an association with Tigray. They often get angry and would like to present themselves as a separate entity. This is not a reaction of one person. it is 99.9% of Eritrean i met reacts negatively whenever there is an attempt to associate them with Tigray people
2 - You said Tigrigna beher didn't exist 2 decades ago. In that case, why did the people of the then northern Ethiopia produced to Liberation fronts (EPLF and TPLF). Don't you think there should have been one Liberation front if they are one entity? And also, if the name Tigrigna Beher appears just 2 decades ago, Is that not the time where the people took the justice on their hand to call themselves or be called by the name they choose themselves?
You are confusing matters here. mic is free