The Democrats immediately shifted into the theory that anger over the bill is simply not allowed. They merged that anger with actual violence, and they took whatever reports and threats of violence they could find and, in turn, merged them with the anger over the bill.
Can we identify neutral principles about anger and violence? How much free expression of anger do we accept in our opponents? When will we listen to it as part of a valuable debate? When do we stigmatize it as part of a system of violence? If the answer to the last question is whenever it serves our political interests to do so, then we are making propaganda.