"So focus on here. Easier said than done, but if there's nothing left for you back there, then there's hardly a point in worrying about it." The idea that things being done wouldn't matter rankles Malcolm. If he was in the same situation--if he'd died during the war and ended up here--

But it's not the same situation. Nowhere near. So York's opinions and feelings override everything else.

(Including the conversation, he hasn't failed to notice.)