Darling, the police of a Socialist state are not equivalent to the police of capitalists. They have completely different motivations. Police under capitalism exist to protect private property and nothing else. The function of the police in a worker's state is the same as in that of a bourgeois state: enforcing the class interest of the ruling class. The difference lies in who constitutes the ruling class.
Capital punishment it is then.
in any other modern nation?
Thousands of people are arrested in the UK every year for naughty tweets. In Germany women are regularly assaulted for peaceful protest.
And why the fuck would you call them nazis? That word even means anything to you, or is anything not supported by RT/Sputnik “nazi”, and the millions of their victims are just something for you to wipe the shit of yer mouth with?
They literally support the genocidal USA and the EU and spread their Nazi propaganda.
Yeah western media are generally known to not ever spread atrocity propaganda, particularly against China.
No no, these CIA savages. You don't know that Pussy Riot are an op?
Here's one of them shamelessly standing next to the Butcher of Gaza.

Can you guess why she was there?
They did have their culture/religion repressed; not in totality but many practices are disallowed or only conditionally allowed. Many innocents are compelled to attend re-education centers that may in some cases restrict certain religious practices.
There were no re-education centres. That's a sinophobic trope. There were vocational training centres. That's all.
were almost certainly subject to abuse by police while in custody
Doubtful. There were no credible reports.