From what I can make out, everyone is asking "what sort of person would take part in a riot?"
It seems to be a huge surprise to find that some people like to let their hair down and some people like free stuff.
The government line seems to be: watch out for people like this:
A solid scoop of ice cream sits in its scoop awaiting its fate with compliant resignation. But when it melts, it runs riot down your chin and clothes, causing both damage and distress.
Most of the time, most of the people do what they know they ought to.. But occasionally, some flashpoint is reached and the populace switches into a different state, where people do what they like.
How did that switch happen?