China's policy towards Hong Kong since the 1997 handover was to integrate them into China by showing how wonderful China would be and essentially convince them that they were better off being part of the Chinese mainland rather than a British colony. By 2019, though, it's become patently clear that many, if not most, people in Hong Kong have come to believe that there integration into China would amount to some sort of Chinese colonization and would destroy their heritage.

You're still doing a wrong to the people of HK by forcing them into an arrangement that they don't want, so it is in no way justified by righting previous wrongs.