Tendo apenas repetido StarCraft 1 até essa traição, ficou muito claro por que Mengsk fez isso.
Nas três missões anteriores à traição Kerrigan, ela foi instruída a usar os emissores de psi para atrair os zergs para um posto avançado confederado menor. Ela fez isso, mas sob strong protesto.
Kerrigan - I'm having doubts about this, Arcturus. I just don't think anyone deserves to have the Zerg unleashed on them.
Mengsk - I know you have personal feelings about this, but you can't let your past cloud your judgement. Carry out your orders, lieutenant.
mais tarde, no final da missão.
Kerrigan - Psi-Emitter in place. Just promise me we'll never do anything like this again.
Mengsk - We will do whatever it takes to save humanity. Our responsibility is too great to do any less.
Na missão seguinte, fazemos uma brecha nas defesas de Tarsonis, presumivelmente para enviar uma força de ataque ao planeta. em vez disso, depois que o Breach Mengsk implanta novamente os emissores de psi e atrai bilhões de zergs para o planeta. Isso causa uma grande divisão entre Kerrigan / Raynor de um lado e Mengsk do outro.
DUKE
This is Duke. The emitters are secured and on-line.
KERRIGAN
Who authorized the use of Psi-Emitters?
MENGSK
I did, lieutenant.
KERRIGAN
What? The Confederates on Antiga were bad enough, but now you're going to use the Zerg against an entire planet? This is insane.
RAYNOR
She's right, man. Think this through.
MENGSK
I have thought it through. Believe me. You all have your orders. Carry them out.
Após Kerrigans represar Mengsk, ele a envia em mais uma missão, uma missão para deter os Protoss que estão, sem saber, defendendo os confederados restantes em Tarsonis.
Mengsk :
If they engage the Zerg, the Confederates may escape.
Commander, send Lieutenant Kerrigan with a strike force to
engage the Protoss. Captain Raynor and General Duke will stay behind with the command ship.Raynor :
First you sell out every person on this world to the Zerg, then you ask us to go up against the Protoss? And you're goin' to send Kerrigan down there with no backup?
Mengsk :
I have absolute confidence in Kerrigan's ability to hold off the Protoss.
Raynor :
This is bullshit. Kerrigan, are you reading this?
Kerrigan :
I heard. I'm going down there. Arcturus knows what he's doing. I can't back out on him now.
Raynor :
Funny. I never thought of you as anyone's martyr.
RAYNOR
Why are you doing this, Kerrigan? Look. I know about your past. I mean, I've heard the rumors. I know you were a part of those
experiments with the Zerg; that Mengsk came and saved you, but you don't owe him this! Hell, I've saved you butt plenty of times.KERRIGAN
Jimmy, drop the knight-in-shining-armor routine. It suits you sometimes. Just not ... not now. I don't need to be rescued. I know what I'm doing. The Protoss are coming to destroy the entire planet, not just the Zerg. I know that because ... well I just know it. I am a Ghost, remember? Once we've dealt with the Protoss, we can do something about the Zerg. Arcturus will come around. I know he will.
RAYNOR
I hope you're right, darlin'. Good huntin'!
Esta missão é claramente uma preparação para Kerrigan, com Raynor afirmando, você vai mandá-la sozinha, sem apoio, e Mengsk respondendo, não se preocupe, ela vai ficar bem. Obviamente, na conclusão desta missão Mengsk novamente puxa um rápido e afirma, uh, não posso chegar a ela, desculpe Jim.
KERRIGAN
This is Kerrigan. We've neutralized the Protoss, but there's a wave of Zerg advancing on this position. We need immediate evac.
MENGSK
Belay that order. We're moving out.
RAYNOR
What? You're not just gonna leave them?
MENGSK
All ships prepare to move away from Tarsonis on my mark.
KERRIGAN
Uh, boys? How about that evac?
RAYNOR
Damn you, Arcturus! Don't do this.
MENGSK
It's done. Helmsman, signal the fleet, and take us out of orbit. Now!
KERRIGAN
Commander? Jim? What the hell's going on up there-
Então, com os livros e material extra de lado, eles deixam claro no jogo que Mengsk trai Kerrigan porque ela está rapidamente se tornando uma ferramenta que ele não pode mais usar, com seus argumentos e oposição aos seus planos.