[Tom Tetroxide]

I’m not sure how Islam fits into the whole conflict since Christians run both countries.

[SunkenCiv]

Hardly. The dictator of Eritrea runs Eritrea.

Ethiopia is officially secular, which means the leadership isn’t anything in particular. Carving new chunks out of Ethiopia has been an ongoing process.

https://theconversation.com/ethiopia-religious-tension-is-getting-worse-5-factors-driving-groups-apart-214278

[snip] Orthodox Christians account for about 43% of the population, while approximately 33% are Muslims. Protestant Christianity arrived in the late 19th century and has expanded rapidly in recent decades to account for an estimated 20% of the population. [/snip]