Lessons of history
Shelley, who was a trenchant critic of the economic oppression of his times, even identified the creation of artificial value in the money system as one of the sources of injustic that drove the street protests. In his poem 'The Mask of Anarchy', written following the Peterloo Massacre in 1819, he included the stanza:
'Paper coin - that forgery
Of the title-deeds, which ye
Hold to something of the worth
Of the inheritance of Earth.'
In his day it was the debasement of paper money that enabled exploitation; in ours it is the ceding of the power of money creation to a self-serving banking system.
To merely condemn the actions of violent protestors, the automatic response of the powerful, is too simplistic. In an important Quaker testimony we are advised to:
Search out whatever in your own way of life may contain the seeds of war. Stand firm in our testimony, even when others commit or prepare to commit acts of violence, yet always remember that they too are children of God.
What history teaches is that when people witness blatant injustice in the distribution of resources and are deprived of a political route to right this wrong, then violence is an inevitable response.
The academic jargon for "blatant injustice" is iniquity aversion.
I'm with the Quakers, by the way. And I don't agree that any outcome is "inevitable," or that there are "laws of history." Just as in Thailand, the worst possible outcome for justice would be a General with Sunglasses -- "win" or "lose."