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It's true. Police have been remarkably restrained in the face of violent provocation. Many have commented that the HK police have been way more restrained than, say, the French police handling les gilets jaunes, let alone American police.
We have seen hours of live streamed action. Sure there's some baton work, but it's seemed to us that it was understandable in the context of demonstrators vandalising property and attacking passers by.
Overall, a fair observer would have to agree the Hong Kong police have been restrained.