It depends on which Oromos youre talkng about.
Over emotional and illogical Oromos who like to talk about seccession are the kinds of Oromos most Ethiopians hate and looked down on as most are aware that Oromos nationalists claim alotta disputed land that previously belonged to other ethnic groups, and they are acting like they are the African americans or somali bantus of Ethiopia when theyve had a violent expansionist history themselves and have played a major part in the political history of Ethiopia for the better or for the worse. Not to mention nobody wants to see another civil,war and everytime Oromos ask for seccesion, theyre essentially asking for the deaths of millions in potential conflicts like in Eritrea.
Then we have the rational Oromos whove realised that they are an integral,part of Ethiopian society due to their history of intermixing with most ethnic groups, and also because theyve also played a big part in highlander history, and that Oromos have been victims but also perpetrators throughout Ethiopian history. And that the only thing Oromos and all ethnic groups need to have is more state rights and perhaps in the case of the Adis ababa expansion, proper compensation for Oromo farmers.
No suprise. This is what the filthy Ahbashi mufti (founder was an Harari) said about the Oromos back in 2012 when they took uprising with the Amhara Muslims against the Ahbashi (modern Khawarijis) threats and made takfir on those who rebel against Zenawi. Although, I'm not generalizing because the majority Hararis are cool and have the tendicies to disrespect you if you support the TPLF enclaved Mekellis.
The problem with Oromos (Muslim Oromos) is not loyalty to the Abyssinian devils, but misplacement of loyalty in general. To be specific;
They enslaved themselves to an ideology of unity with christian Oromos who in their hearts have a soft spot for Ethiopia so in other word, the christian Oromo are very loyal to pan-Ethiopianism. It's been seen has modern and progressive to have christians in the leadership (ie. the OLF's christian leadership of 30 years and counting). And movements who refused to accept christians (ie. IFLO) were branded backwards, anti-unity, & dividers of Oromos based on religion etc. (as if that were negative), parading around phrases like "religion is for the individual, while nationality is for the nation". And such people are those whom Allah targets for humiliation.
Two classic examples of this is in the Horn was when the ELF (Eritrean Muslim force in the 60's/70's) founded by Idris Hamid Awate started accepting christian Tigrinia who were on Selassie's side (until he was overthrown by Mengistu), then later stole their weapons and turned against ELF (Isayas Afewarki) by justifying they were "Jihadist", and the OLF founded by Sheikh Abdulkarim Ibrahim, accepted Oromo Christians (in the 70's), who later sewed disunity among them which collapsed the organization, then they seized power, and began to sabotage the movement, resulting finally with the humiliating capitulation in the 90's which brought the TPLF to power.
Simply put, Allah humiliated them. Shid, it pains me to tell this story but, I was watching an 18 year old video of IFLO (Oromo Islamic group) entering Harar city when mengistu regime collapsed, one fighter stood on truck and screamed to the crowd "TAKBEER". The crowd replied "Abbaan biyya Oromoo dha, Abbaan biyya Oromoo dha!" (The fathers of the land are the Oromo! The fathers of the land are the Oromo!). No concept of al walaa wal baraa. And those who do not have this concept end up being humiliated in the end. Things have changed tho, especially after 9/11 many have snapped out of their hypnosis.
People don't realize that the OLF are more ANTI-Islamic that the TPLF themselves. The Once leader of the Org Lenchoo Gelata let thousands of Oromos(majority Muslim) perish for nothing at the hands of TPLF by the way of execution or bogus genocide trials that resulted in executions. While he himself became leader of an Pente Christian Organization group for Africa. Not to mention horror stories of Muslim oromo from the east fighting in the South telling how OLF leaders down there controlled somewhat of a totalitarian rule and if you would even beep out the slightest of advice to them to do things different, well that would be the end of you.