It might be the most racist, actually
South Africa had its Apartheid policy from the 1940's to 1990's and there is still institutional racism there
Rhodesia (now Zimbabwe) was under white minority rule until the 1970's
Rwandan Genocide in 1994 killed 1 million people (this was the most recent major genocide in the world)
the Burundian Genocide in the 1970's and 90's killed 200K+