Probably the dude that fathered hawiyes. I'd fight that nigga to death to prevent that wretched tribe from ever existing. All Somalis thereafter live in peace.
In the future, you travel back into the past and fight Hawiye Irir Samaale himself, declaring yourself as the champion of the Darood nation. You beat that nigga to within an inch of his life, but before the final blow, you're suddenly ripped from the past and sent back to your own time, sowing the seeds of discord and hatred that caused you to travel into the past to begin with.
It was all your fault unstoppable, aabaha wasee.