are you saying you think football hooliganism caused Hillsborough?West Stand ManFinchley RoyalWest Stand Man
Also, I suspect that the club, the FA and the government are less concerned with civil action by fans involved in an incident and much more with the risks that they perceive from criminal activity (such as that which prevailed prior to the changes in stadiums). They may or may not be unjustified in that perception but that is the way it is.
The stadiums were made all seater for safety reasons, not to prevent "criminal activity". The goverment's response to criminal activity was the proposed ID card scheme. If it hadn't been for Hillsborough, then there wouldn't have been the change to all-seater grounds.
So football hooliganism wasn't criminal ?
On the Hillsborough bit we are agreed (to some extent) as it was the straw that broke the camel's back.
If not, then what "camel's back" was it exactly that the "straw" broke?