why do ghanians and nigerians need a visa to travel to south africa yet non commonwealth contries do not need?

countries that are not commonwealth go to south africa without visa yet ghanians and nigerians commited commonwealth countries need to have a visas why

Every country has the sovereign right to decide who may or may not enter its territory. According to International Law, no reason need to be noted.

because many of them are cons, fraudsters and the like.

ever wonder if maybe its because south africa is tired of dealing with illegal immigrants from those countries? the govt can't even support its current population, never mind find and pay for a workforce to deport them again. as it is only about 10-15% of the current south african population pays taxes, and those taxpayers are overburdened already.

I lived in Ghana for ten years, and the answer to this question is unfortunatly because there are so many people trying to seek asylum. ghana and nigeria have also had problems with drug smuggling and are deemed as higher risk countries. Hence, the extra precaution of needed visas to enter sa.