[Estinien furrows his brow, his expression becoming a bit more tense with uncertain energy. He doesn't look angry, exactly, but he clearly doesn't think it's as simple as Jaskier's admonishments would make it out to be.]

Regardless of who she fights for, what is my alternative? To allow her, and any others that further Thorne's ends, to do as they please simply because... I should be afraid of them?

[He gets the impression that Jaskier thinks that he's incapable of handling Yennefer and therefore shouldn't even try, which is... frustrating, and has not ever been his way of approaching challenges, especially when he only had other people's anecdotal opinions to go off of. To simply lay down and accept Thorne's dominion without even trying... what would be the point of it?]

The effects of their actions are real, regardless of their power, regardless of their goals. Thorne already takes too much for granted.