Let’s get one things out of the way first.
The state is violence.
The entire structure of capitalism, suppsed ‘liberal democracy’ and all the institutions that administer the system you largely take for granted is based on and maintained by force and threat of violence. It is a sort of mafia that people have learned to not question, because it’s so established by tradition and longevity.
What is pertinent is that those in power get to define what is and what is not violent. Their own projection of power, enforced by police and military, is deemed a socially acceptable norm, the natural state of affairs. Any challenge to it is “violent”.
In the past, a slave rebellion could have been denounced as “political violence”.
The French Revolution was “political violence”.
The American Revolutionary War was “political violence”.
The Indian Independence movement was “political violence” (ignore the nonsense narratives about Gandhi. It was the likes of Bhagat Singh who won it.)
Palestinians attempting to emancipate themselves from Israeli oppression is “political violence”.
There is a very long history of portraying any protestors that challenge established authority as unjustifiably violent. And that’s before the state’s use of agent provocateurs.
I do not condemn all political violence, because “political violence” is not all the same, and does have different rationales. A lot of what is deemed “political violence” are attempts at emancipation from aspects of state violence and various systems of oppression.
For the Trump supporters who occupied the Capitol, their gripe is that the state wasn’t being violent enough in support of their would-be dictator.
For you, @Demosthenes “political violence” is conveniently limited to violent action directed at government buildings, institutions and politicians. What I’d ask you is is what are people to do when the people in those buildings are the violent ones, and would you even recognise it if they are.