Tensions are rising on the streets of Hong Kong. Back in Beijing, what might China's leader be thinking about the scenes on the streets? 1) ‘I brought this on myself’ Beijing gave Hong Kong democrats not even a fig leaf of cover over the rules for nominating election candidates. Some warned that there would be trouble, but Xi Jinping clearly decided facing down protests now was preferable to risking the emergence of a local leader with real legitimacy. Today is the inevitable consequence of last month's announcement from the Chinese parliament about restrictions on universal suffrage, but it is also a direct political challenge to Beijing – and therefore a defining test for…