The impact of timing. Uganda Amin kicked the Asian (Indian) out. These people have been living in Uganda for over 3 generations. They preserved their own culture. ie they were a close knit community. Sure enough their arrival in huge quantity over a short time period created friction. While bitterness of resentment was still fresh in the mouth taking 2-3 millions Chinese could certainly destabilize the country. As luck could have it Brexit kicked out a lot of Polish workers. An influx of HK Chinese, BNO, was good timing.