After Peeta helps Haymitch, what is the striking realization that comes to Katniss?

When Peeta helps Haymitch, Katniss comes to the realization that Peeta is kind. She also realizes that because of this, Peeta is also dangerous.... she has a soft spot for kind people, and there is no room for soft spots in the game.

So I’m pondering the reason why he insists on taking care of Haymitch and all of a sudden I think, It’s because he’s being kind. Just as he was kind to give me the bread. The idea pulls me up short. A kind Peeta Mellark is far more dangerous to me than an unkind one. Kind people have a way of working their way inside me and rooting there. And I can’t let Peeta do this. Not where we’re going.