I'm sorry that you lost family members; and may they rest in peace.
If a different group of people enter your lands for mutually beneficial commerce; are still clearly a demographic minority in your ethnic lands; and abide by your laws... you're in the driver's seat.
It's really up to you to make sure that you retain the edge in commerce; and control the official and un-official levers of power.
Indians didn't even do anything wrong in Uganda; they were just used as a scapegoat by Idi Amin due to his incompetence and mismanagement.
The truth is that Uganda could have invested into their entrepreneurs and significantly reduced their dependence on Indian owned businesses.
Idi Amin was a Karo (South Sudanese ethnic group) so I'm not even criticising him for invalid reasons.