Because the bereaved person didn’t take issue with PunditLisa’s post. If he’s not pissed, we have no right to be. And if he is pissed, then the only thing you should do is apologize, and let it drop.
Here’s the quote that really made you out to be an insensitive moron:
(My bolding) THAT’S a completely horrible thing to say to someone who just lost his sister.
Everyone makes mistakes. Everyone shows bad judgement sometime. Figuring out what to say to someone who has suffered a loss isn’t easy. But if you fuck up and the person comes back at you, the only thing to say is “I’m very sorry” and let it drop. NOT toss it back at him as his problem that he didn’t take it the way you thought you meant it.