I am 90% certain that foreign intelligence services or service are actively involved in the riots.
Probably funding it at least partially and inciting the crowd. Probably have assets in the group of protesters to direct their activity.
I have written before that China has been far more lenient than the US would have been under similar circumstances.
The moment someone had broken into congress they would most likely get shot, at least enough to stop them.
Shutting down an airport would mean spending quite a bit of time at a "detainment camp". Often in warehouses created by law enforcement to hold a large number of people outside of regular courts and jails (See the DNC in Denver).
The protesters are, for whatever reason, hell-bent on forcing China to act in a brutal manner. Any regime would.