furthermore, the riot card can only ever be played once. Yes, the supporters of the anti-establishment are tacitly supporting the rioting. However, youth rioting tends to be a psychological game rather than political. Kids grow up. What happened to the hippies and Vietnam war protesters? They became CEOs of today and supporters of Middle East invasions. There will always be some kind of youth movement every decade in any given place (90's anti-globalization, 00's anti-Iraq war, 10's climate change, etc.)
To go further into what SampanViking suggests, what if the anti-establishment carries their momentum and manages to control LegCo? If violence continues, then they are exposed for what they are. If they aren't, then they are tasked with a whole new agenda.
Political reforms are their top priority. Let's say they all agree on this and Central government decides to give it to them. Then what? Likely, the factionization will begin. There will be some pro-independence parties cropping up, there will be others that simply wanted popularly elected LegCo and fade away, Pro-Beijing parties will always be there.
What will challenges would a more "independently" (not independence) minded executive do if they wanted to distance themselves from mainland? First on the agenda would be self-sufficiency, so water and power would need to be localized. As before, desalination plant is expensive and large. Power can be cheap if you build coal, but super polluting, and take away useful land, the terrain is not good for solar and wind, and obviously nuclear is impossible. Beyond that, pursuing self-sufficiency would mean less money for building housing, the biggest issue for most HK citizens. Carrie Lam's Lantau Tomorrow cost 600 billion HKD and was laughed at, what would desalination cost for all of HK, they already pay 20 million HKD per year to GD for water, so the cost for desalination would be far higher and provide no housing. How do you sell this to the population? Another issue, if you decide to throw HKPF under the bus, what happens when they don't try to control the next riot? This certainly has happened in other places before.
In the end, as it was planned, Beijing sits in the catbird seat. I think they held off on any intervention because their planning horizon is so much further ahead than what we are used to in Western countries. The result of this election, it actually shows 1C2S is working. If they allow reforms, they look benevolent. If they continue with 1C2S as it is, then they are still allowing HK autonomy. The only way they can look bad is if they actively intervened (politically or paramilitary) which they did not. The anti-China arguments will dry up over time.
This movement is no longer anti-China but instead it is anti-Chinese. Just look at Taiwan today, I don't see much hope. Tribalism and populism are quite different from the counterculture movement such as hippie. For all these years, DPP has easily reignited resentment towards KMT and manipulated election result to win elections after elections even though it has failed miserably to lead Taiwan.
Same thing with the anti-establishment parties in HK, they are stuck with the radicals. They would get buried if they tried to cut tie with the radicals. From this election, it clearly shows that they are willing to discredit the election results if things didn't go in their way. Rumors are every where and people have started to surround many poll stations til most results showing their candidates are winning.