And yet that still doesn't absolve the Comedian from killing a woman and her unborn child... because he didnt feel like dealing with them at the time.

Manhattan's inaction has very little to do with how this colours the Comedian. He's no saint, but he's going through a lot more than the comedian, he didn't stop it, because to him, it already happened, he sees time all at once. Still, I just think he's being a tad dramatic there too.