When you're life is at risk, you're options are limited by the person pushing behind you, the people to your sides and the people in front of you blocking exits when in a crowd... there is little point in blaming the victims for the stupidity that comes from groupthink.
You've hit the first point spot in. Those people who were penned in couldn't have done a thing. They were sadly doomed by the actions of those around them, as was baz in my example. Let that sink in though. The actions of those around them. Conscious actions. They didn't set out to cause the damage they did but they undeniably caused it.