He led a team into my country under the pay of Achebe, to kill certain individuals. Achebe is a man who has consistently tried to undermine my rule and the stability of Wakanda.
I don't think I'm capable of harming another, so you have nothing to fear. I do not have the upbringing my dream self has, in particular fighting skills.
Plus, I believe the mercenary has an uncanny ability to heal rather quickly.