The Left Hand of Darkness Chapter 9 & 10 Reflection

I am not sure what Le Guin is trying to say about the peace between the Domain of Stok and Domain of Estre in Chapter 9. Arek of Estre and Therem of Stok meet each other and start kemmering as if they’re going to be together forever, although they both accept that they are mortal enemies of each other. They remain together for about 2 days and suddenly one man of a group of men from Stok kills Arek of Estre with a knife while Therem of Stok watches his bloody death. Therem of Stok then simply says to the murderer to take Arek’s body back to Estre for burial. In the other half of the chapter a story similar to this one is repearted with the son of Arek of Estre.
From what I understand, Arek of Estre is called Estraven and Therem of Stok is called Stokven.
One sentence I did not understand was when Estraven asked in p.126:

“Did you warm me back to life in order to kill me, Stokven?”

Why would Estraven ask why Stokven was trying to kill Estraven if clearly, Stokven was trying to save Estraven’s life from the cold?

I think Estraven asks this because Estre and Stok are supposed to be enemies.

In Chapter 10, Genly Ai reveals a big secret to some Orgota people. That secret is that Genly has a starship orbiting Gethen’s sun in case he has to call it, if the Orgoreyn government actually accepts Ekumen relations and trade. Genly is being spied by one of Tibe’s spies while he says this. One of the spies, Gaum, tries to make Genly look like a liar or even a lunatic.

I basically think that if Genly had brought more people from his Ekumen place, Gethenians would be convinced that the Ekumen are actually real. Then Genly would have accopmplished his goal of exploring and befriending the Gethenians. The mission, however, is not easy because Erhenrang has already rejected Genly’s mission, from what I understand. Orgoreyn is almost his last hope to convincing Gehtenians, but in order to achieve the alliance between the Gethenians and the Ekumen, war will have to break out. Genly kind of doubts the Gethenians will be in a war and thinks he is surrounded by a “fake” world. That, I think is a sign of losing confidence in Genly’s mission.