I'll kick them so hard they won't have any bones left in their body.

[He probably could manage to shatter every bone with one kick. And the dark look in his eyes says he's prepared to. Despite all of his mercy and sorrow towards these zombie-things now, facing someone like that... He doesn't have a problem with it at all.

Lightening up from that, though:]

What was your name? I've gone and told you mine, after all. I think we could get along.