The only thing I find surprising about this article is that the U.S. State Department did not anticipate China resorting to so called “thuggish” behavior:

After weeks of escalating warnings alleging a covert U.S. role behind the protests in Hong Kong, the tone in Communist Party-backed media outlets is turning darkly acrimonious, with publications attacking a U.S. diplomat in Hong Kong and releasing her personal information. 

The pro-Beijing newspaper Ta Kung Pao on Thursday published a photo of opposition activists meeting in a hotel with Julie Eadeh, a political section chief at the U.S. Consulate in Hong Kong, along with details of Eadeh’s State Department career and the names of her husband and teenage children.

The report, which was recirculated by Chinese state media, emerged as Beijing doubled down on a familiar strategy of framing the nine-week-long protests as a U.S. intelligence plot to spark a “color revolution” to destabilize China.

The publication of information about the diplomat drew a furious response from the State Department, which accused China of “thuggish” behavior. U.S. diplomats around the world often meet with opposition figures and groups, occasionally drawing rebukes from governments.

The unusual pinpoint attack on the diplomat in Hong Kong underscores China’s growing frustration over the protests and their anti-Beijing message.

Washington Post

You can read more at the link, but it was utterly predictable that China would turn to nationalism and blame foreigners for the unrest in Hong Kong. The U.S. diplomat meeting with protesters was just the optics they needed to “prove” their invented narrative.