This was when the SNM was first founded in England, before Siad Barre even targeted Isaaq, before the SNM even began any operations and before Siad Barre had to rely on MOD. Even so, the Ogaden were also the ones who founded the SPM, the second strongest rebel group.
The day SNM was formed, it was a movement fighting for the sake of tribalism.
Jubair ibn Mut’im reported: The Messenger of Allah, peace and blessings be upon him, said, “He is not one of us who calls to tribalism. He is not one of us who fights for the sake of tribalism. He is not one of us who dies following the way of tribalism.”
Source: Sunan Abu Dawud 5121
"Subsequent Isaaq propaganda(poems, radio broadcasts) to mobilize their population was filled with a most vile, abusive and racist language against the Daarood people. Demonstrations held by students in Isaaq cities like Hargeysa and Burco were notable for the vile anti-Daarood slogans chanted by the participants. It became soon became fairly obvious to anti-government Daarood students that the Isaaqs were not so much anti-government as they were anti-Daarood."