Holding to colonial partitions as iron-clad in the case of Somalia is particularly debilitating, and sets Somalia up for failure. Unlike virtually every other state, Somalia was cut into multiple pieces and colonized by not only European but African countries. To say there is no going changing this, that Somalia just has to deal with their particularly pernicious colonial set-up, is unjust. I mean, the people of the NFD voted overwhelmingly to be part of Somalia in 1962, and they were just ignored. Ethiopia implemented a scorched earth policy in the Ogaden, and I suppose they just supposed to ignore it.
The argument is that had Somali boundaries been adjusted and the Ogaden & Hurd areas, which were forcefully seized from Somalia by the Ethiopians, was returned, there would be "wars" and "African already has so many of them". Actually, they don't. Africa is remarkable for having very very few interstate wars. The wars plaguing Africa are civil wars, and how exactly have rigid colonial boundaries helped Somalia out with that? What could be more devastating than two decades+ of civil conflict and state collapse? Furthermore how has Ethiopia been helped either?
"I wonder if Putin33 would support a Somali state controlling the Ogaden if Ethiopia still had a communist government."
Actually, yes, I would. Somalia, people forget, was the Soviet Union's first and most loyal ally in sub-Saharan Africa under Siyyad Barre. Ethiopia, under the Derg, carried out the very same policy that the Emperor had carried out before with respect to its non-Aramhaic territories. The Ogaden rightfully belongs to the pastoralists, and keeping pastoralists away from important grazing grounds is economic strangulation.
"The war that Somalia started by invading Ethiopia? "
That's simplistic. Siyyad and Somalia were precluded from peaceful negotiation of the Ogaden issue. Over & over again their concerns were ignored by the OAU and the UN, because Ethiopia had great prestige due to WWII. When Selassie's vile regime collapsed when it ignored its own people starving in 1974, an organic rebellion sprung up in the Ogaden and Oromia. At first Siyyad ignore the rebels and didn't support them, wanting to see if he could negotiate with the Derg. But due to the brutal campaign of the Ethiopian state, refugees began pouring in, and the Ogadeni clan, which had always been an important clan within the Somali military, was agitated heavily to support the WSLF. Somalia didn't have much of a choice. The rebellion was going on anyway whether Somalia supported it actively or not, but if they didn't support it Somalia could face armed insurrection themselves. This was the only chance to do something about the Ogaden issue.
As for them not being close, the parliamentary government in 1960 openly agitated for Pan-Somali reunification and Somalia did everything it could, while still a state, to reunify its lost territories. The reason its flag is what it is, a five-pointed star, is because it refers to the five Somali territories. When allowed to vote on these issues, the Somali population in Djibouti advocated for reunification with Somalia, as did the NFD. The Ogadenis expressed their votes by rebelling against the Ethiopian state since 1960, when Somalia was formed.
"Jumping the gun to a union just because it suits your romantic notions about a united Somali nation seems a bit silly."
Invictus, you reduce every problem to what would be good for your international order. Nothing else matters. The regional particularities don't matter. The fact that Somalia risked everything for this so-called "romantic idea" doesn't matter.