Proves what?The fact that he fought successfully in battle and conquered, proves that. Not just the wars he fought against neighbors, but the ones against armed and tough foes-the mahdists, he fought the strong armies of emperor tewodros, he was an excellent horseman and won the jousting contests the locals had-which is how he got the attention of menelik in the first place.
the jimmans did not resist and were not massacred- no churches were even built there in meneliks time.
yes, that is true, the ending part of what u wrote.
Its no brainner when you have latest guns donated by the West against old ottoman rifles and spears.
The west prevented the natives from acquirong new guns unless they allowed them at the port.
Its only when Gobena sided with menelik( The favourite Western vessel) that did he commit attrocities for you to be proud of.
Without Menwlik Gobena would just be a chief in his village and wouldnt have the chance to even over power his next door neighbour.