What did Siad barre take from you? Hararghe was Somali already. Genetic studies prove they're all mostly of Somali stock. Did and Hawiye clans still live there like us Ciise. Many of the Oromo clams there still retain their Somali lineages and their elders will recite them to you. What exactly did Siad take from galla you didn't already take from us?
You have no original land beyond southern Ethiopia. Everything else is simple assimilated. That's why western oromo are orthodox, wear habesha kemis ect. Eastern oromo in Somali lands like hararghe and bale wear Somali clothes like Dirac and Guntiino, practice islam, claim Somali lineages and are genetically Somali. You are not a real ethnicity. Oromos beyond Borona are just a group project.