I don't think we should be shielded from offensive news. Sometimes it's good to be offended and not pretend it didn't happen.
I found 9/11 very offensive. People jumping to their deaths. Families destroyed. An attack on the Pentagon.
I wouldn't ask the moderators to pull the threads on that. It's news. It happened. Censoring it wouldn't make it not so.
You make some fairly strong points. I will ponder what you said. I've already complained and I still stand by that complaint. That thread is very offensive, much like dropping a crucifix into a jar of urine. Must we tolerate all sorts of blasphemy without a protest? I don't think so. Knowing that it exists and tolerating it in my face are two different things.
I will be thinking over this dichotomy for future application.