May be Kalonzo should arrange a return match and have Raila handled 'properly', not necessarily mere words but consider having him run out of town a bit.
Of course given the near religious fanatism of Railas followers, there might be many more nasty matches after that.
This is stuff for the savage anyway.
The only politician who can match Raila toe to toe here is one Ruto William.
First they ignore you, then they laugh at you, then they fight you, then you win!