If you mean the anti-gentrification campaigns in London, this is exactly the point. Native Londoners generally don’t feel like they sit on a pot of gold because they own a house. On the contrary, they feel like they are being priced out of their own city. I guess the difference is that the city was not built up in the last 20 or 30 years, allowing lots of locals to get lucky by buying a house when it was worth next to nothing. Also, the Chinese government gave away its stock of state housing to the people (those lucky enough to live in an urban area and live in a state-owned apartment) at the end of the nineties for much less than its real value.

“Most of those other cities are not quite as hard to manage as Beijing though, in the sense that going to the other side of the city doesn’t feel like a trip to the other side of the moon.”

Londoner’s attitudes about “south of the river” aren’t far off that.

“Also, I haven’t heard about Londoners or New Yorkers from ordinary backgrounds, with little education and no real job, feeling superior to outsiders because they own a house.”

True that – although, on the other hand, isn’t the whole anti-gentrification thing a little bit reminiscent of this? Not in this sense of feeling superior just because you own a house, but in the idea that the city “really” belongs to you and not the people who are rich enough to afford a house there.

Also, I haven’t heard about Londoners or New Yorkers from ordinary backgrounds, with little education and no real job, feeling superior to outsiders because they own a house.

From a dictionary:
假
jiǎ
不真实的，不是本来的，与“真”相对：假山。假话。假冒。假释。假死。虚假。真假。弄虚作假。

Since 北京 is more than just a name of the city but is a symbolic byword for the CPC and its authority, when you put that on the same hashtag with the letter for “falsehood” or “fake” that will result in a block.