Someone should remind him the Hong Kong protests were started to prevent the extradition of a dude who chopped up his girlfriend and put her in a suitcase. I’m not pro-law enforcement or even close, but the Hong Kong protests are a really strange thing to fixate on.
In reality it was about mix of reasons, main ones was, first, HK was choke full of various crooks who would had chance to move to slammer under Chinese law so they shat their pants, and since they were influental there they incited the petty burgie mob going hard on red scare, commies confiscating their toothbrush etc. Second main reason is because the new law was a step towards decolonisation from British colonial and financial power and this moved the really big players to support the former two levels.