South Africans are calling for Nigerians to leave their country after a video went viral, showing a woman, believed to be from South Africa, twerking for some Nigerian men.   #NigeriansMustFall is the number 1 trending topic on Twitter at the moment. South Africans are using the hashtags #NigeriansMustFall and #NigeriansMustGo to call out Nigerians, while blaming them for the rot in their society.     In the video that caused the outrage, a woman is seen pulling down her …