This could happen to any crowd. And it isn’t related to any malignancy or disorder. Years ago I was in a big tight crowd behind the grandstands where the betting windows were. Just the normal, slow push to the exits compacted the section of the crowd I was in, and it got very scary for about 10 seconds. All it takes is for one or two people to trip, fall, or panic in some way and the noise ignites the crowd.
Getting caught unexpectedly in a mob is one thing. This was planned though. No one was forced to get out of their cars and rush the doors. After thinking about it I agree. Everyone in that crowd should be charged.
I forgot to add in my post that the compacted crowd that I was in was at the Kentucky Derby. It was in an area of wealthier fans, so no cheap and easy stereotype can be applied.
True — I was in two crushes at 70’s era rock concerts. In one I was almost pinned against the wall, but I braced against the wall with my mighty legs and pushed back to create a open zone at the wall for those with me. The second time was a lesser crush mid crowd during which some sleazebag tried to lift my wallet, only to have his wrist grabbed and his thumb bent back — which I would have taken all the way except that the sleaze being quick of hand, deftly parried and rolled away into flow of the crowd soup.