Friendo, you have have not derailed the thread. This is a place for sads. It is okay to talk here about things that have hurt you. I'm not sure if "What Bauglir is taking away from this terrible thing that happened in somebody else's life" is helpful, but since you mention not wanting to turn anything into a call for action, I just want to reassure you that it doesn't seem like that's the message you wanted to convey here. As far as I can tell, it's not like we (or you, I think) should redefine our lives and goals in the context of this one thing. But it is something to remember; for me, I didn't know those people, so the really important stuff, the things you learned from and about them, that made them family to you, aren't part of that thing to remember, but I do think that remembering that this happened will remind me of the importance of trying to understand people and helping them if I have the chance. Not so much action as mindfulness - not seeking out people who hurt, or taking responsibility for making sure something like this never happens again, but keeping an eye out for those situations when there is something I can do to help someone who needs it.
I mean, that's what I feel like is what can be reasonably done. I don't really know, though; I'm just some jackass on the Internet, so take from that what you can use (if anything) and don't sweat the rest.