They are called secret police centres in Canada because of the actions they pose, and the threats they make. They'll threaten to kidnap you and extrajudicially extradite you to China, they'll threaten your relatives in China, they'll force you to stop behaviours considered inappropriate by the CCP, they'll try to recruit you as a spy.
To the Chinese Communist Party, the Han ethnic group belongs to the Chinese State, and everything anyone of this ethnic background does is their business.
Some of the actions you mention would definitely be illegal and yet, no one has been prosecuted nor found guilty. In fact, the concerned centers in Canada are suing the RCMP for defamation. So you are either speculating or spreading propaganda.
But people have been charged by the Canadian government over people that have been taken to China. Referring to actual Canadian court cases that are in regards to actual people taken to China is propaganda because?
Edit: Why am I blocked from replying to the below comment?
I previously asked what you were referring to because I genuinely don't know what you are talking about. Of course I don't believe actual criminal convictions are propaganda, but there have been none in relation to the so-called "police centers".
To the Chinese Communist Party, the Han ethnic group belongs to the Chinese State, and everything anyone of this ethnic background does is their business.