Nothing. [Of course, when he says it, he's not talking about Garak's home or people, but his own. His family, those seventy two souls who mean more to him than anyone or anything. But he understands, it's good to meet someone else who gets that sacrifices have to be made, and that nothing else matters at all. It's an easy choice for him to make.
Khan is finished with the bag now, and takes a step back to show it, though he still has his gun in one hand. He's not going to trust the other, but he's somewhat less concerned about letting him keep that interrogation equipment. Maybe he'll ask to borrow it later, if he has any need of it. And he will, once some Cultists are captured. With the way Garak talks, Khan is beginning to suspect he might be doing more than simply taking the equipment for safe keeping.]
Yes, I don't doubt that Kirk wants to save our world, and his crew, but he especially won't do what needs to be done. He seems more concerned with protecting the civilians here, even as they secretly join the Cult and conspire against us. [A beat.] You are only of the only people I've encountered since I arrived here who seems to understand these things. [Him and Luke, basically, and probably Abathur, but Abathur is likely just going to do what Khan tells him.]