It’s common for terrible acts to go unpunished. There are lots of movies and shows where the bad guy wins. Many where you can’t even tell who the bad guy is. But they’re still good stories.

That’s kind of my point though, the show failed to make any statement about it, including this one. In fact, what you say here would have been an exceptional statement to make, especially considering the post-9/11 backdrop of this season’s arc. Instead they were just like, “ANYWAY, time for some timetravel shenanigans” or whatever the next season was doing, I don’t recall. That absence of comment is the failure the show makes is what I’m really saying.