Your fathered got emotional and ignored common sense. You do not dare someone to kill you, less he takes it as a challenge. That might not have been an empty threat; they might be bidding their time and the right time/place. I would advise your father to stay away from Mogadishu; it isn't safe for people like him.
They said on the phone they were going to kill him at 8 PM.
He said, if you're going to do it... do it. What's all the talk for?
He traced the # and got the phone company to shut the number down.