Dig deeper and the story gets more strange.
Apparently the "DONT TOUCH HER" guy is a literal CCP spy. His name is Newton Leng and he runs a for-profit college in the UK called 'IOE: Confucius School'. Which like many other for-profit colleges are venues to side-step immigration laws. In fact, a year before this incident took place the UK government wound up shutting down a hundred of these schools because of what they were doing. Leng operates the last few remaining. Apparently his 'mission' is to pull off stunts like this, to subvert public freedoms by applying their own Communist beliefs to Democratic countries. Which is why there was this blow out, because Leng believed the Piano player should have to conform to his beliefs, despite the Piano player's rights in his own country.
One shouldn't be too surprised how bad such subversion is in Canada either. Look at the uproar with the Liberal Government putting a 2 year cap on "International Student" admissions. Most similar for-profit colleges that bank on International Students will close soon now. ... but that still doesn't undo the damage already done; like with Secret CCP Police Stations.