For 30 yrs Amharas fought their a$$ off against Shabea. They spent billions and billions of dollars and hundreds of thousands of lives fighting to prevent the Anseba people from breaking away from Amhara-dominated Ethiopia. When it became apparent that the Amharas couldn't prevent the break away of Anceba-land, Amhara leader Mengistu proposed a cease fire agreement with Shabea leadership to let them take Anceba. The agreement didn't work out and the Amhara army was finally forced out of Anceba. Today, the Amhara not only support the independence of Anceba but are willing to be inferior partners with the same people they denigrated as "Tegentay wenbedes" just 20 years ago.
Dergue-Amhara history with Tigray was no different. First the Amharas fought TPLF to the last bullet and to the last soldier. When they realized they are no match to the Tegaru fighters, Mengistu said heck Tigray is poor it doesn't have money worth temene megza and decided to let TPLF control Tigray and Dergue/Amhara control Ethiopia. TPLF refused and pursued its goal of liberating all nations and nationalities of Ethiopia which finally succeded in 1991 getting the entire country rid of the fascist Amhara army.
At this point the "pro-unity" Amhara wish and vision was reduced from controlling the entire Ethiopia including Tigray and Anceba to hoping that the Tigrayans would just leave like the ancebas so that the Amharas could control the rest of Ethiopia. Today Amharas' biggest wet dream is for Tigrayans to separate from Ethiopia and form their own republic so that the Amharas can rule the rest of Ethiopia. Amharas are addicted to being the unchallenged rulers for 100yrs and they love Ethiopia (minus those in it who have defeated the Amhara).
The lesson for all other nations and nationalities in general and for Oromos in particular is that, if you want the Amhara off your back and if you want them hope you were too far away from them, defeat them! When you defeat them, the Amharas want you away and whats better for the Oromo and other nationalities than the Amhara wanting them away??
Amharas do not love a united Ethiopia. They only love a united Ethiopia that they can rule with impuinity.
Another word of wisdom for all non-Amhara nations and nationalities: the Amhara will only respect you if you defeat and humiliate them! Specially Oromos have historical obligations to defeat the Amhara and revenge on them for the crimes they commited against the Oromo. Its a shame for Oromo-holocust leader Minelik hawelt to stand erect in the city of Finfine, captal of Oromia with 35 million oromos. The Oromo need sone charismatic group of leaders who can unify them on a common anti-Amhara ground to wipe the neftegna out of their land and ban Amharic in Oromia.



