Yeah, it comes across as a very smartass euro-elitist response to the 9/11 thread.
I'm going to have to agree too, but I think whether it be with 9/11, Pearl Harbor, Srebencia, the Holocaust or whatever, people who were affected by these things are going to remember it, and those who aren't aren't. When you start a thread in a discussion forum, you invite discussion. With things like 9/11 that caused so many ramifications, people will be very content to go on about whatever they felt about it without thinking of the tragedy. At the end of the day, there isn't a lot to discuss about the actual tragedy within of itself, 3000 people were wiped off the face in the earth in the space of a few hours. Such a thing is largely incomprehensible.
The point? People will react to the consequences and media coverage of a tragedy, and not really the tragedy itself because there's really nothing that can be said for something on that magnitude. Conclusion? Don't open threads on such things, and if one is opened, people aren't going to talk about the death and suffering.