[major_setback]

I'll explain why people are upset.

There is a tradition on the forums (this one and Ubisoft's) of not posting any offensive material. There are children who come here for one thing.
To show a film of a plane that crashes into a crowd killing 67 people is not exactly the best way to make a point about making realistic crash-models.
It's why people get angry. To most people it is very distasteful and disrespectful, to say the least.
I think that if films like this have ever been shown before then it has been done in a spirit of compassion, where the horror of the event is the point that is being made.
I know that I can't watch them without thinking about all those injured or killed.