i dont know weather to take you serious somalis became farmers recently. harla's live in between harar and dir dawa. they dont live that central of ethiopia.
secondly you claim 'No darood near them' are you forgetting Geri koombe who live in harar and were the last one standing even when menlik invaded they still stood their ground. also Geri koombe have intermarried with the amirs of harar. harla are closest to their koombe brothers then to any other group in the horn. i have a harla relative he claims koombe darood
Issas were part of adal we formed our xeer and crowned our first ugaas in zeila after axmed gurey died in the 16th century