The movement does not happen in vacuum. The Occupy Central movement was initiated by Tai Yiu-ting in January 2013, and Hong Kong democracy movements dates back to 1990s. From the very beginning, Tai Yiu-ting and the two other leading organizers of Occupy Central have stressed that they want to negotiate with Beijing. They even took a very mild stand in the political reform discussion that many other opinion leaders in Hong Kong condemned as "too mild".

Yesterday's events is triggered by Beijing's "ruling" for Hong Kong's 2017 elections. While citizens would be allowed to vote for the chief executive, the candidates for the election would have to be approved by a largely Beijing controlled nominating committee. Beijing's plan is obviously non-democratic, and it is no different than a categorical rejection of all demands made by previous Hong Kong democracy movements.

It is fair to say that the large-scale non-violent civil disobedience movements in last few days and very likely in coming weeks are the result of failing to negotiate, which I think the government with the power should take the responsibility. Since the economic and diplomatic situation of China today is very different than that of 1989, it is not likely that the government could repeat what it has done before. Reopening the negotiation is not something unimaginable IMO.