A common thread with Mr Trump's trumped up quotes is that they are inspired by a generic disparaging comment he has made about one group of people, which are then reversioned by fake news sites to appeal to their local audiences.
In this case, the inspiration for the false story came from Mr Trump's comments about Mexicans and Muslims, which were easily reversioned to capture the attention of Nigerians.
Several websites ran stories based on these made-up quotes:
"American Billionaire and Republican Presidential Front-runner, Donald Trump, has shot a subtle warning to the Nigerian Community in the United States, after he said all Nigerians would be made to leave the country 'when he becomes President'. He made the 'threat' during a rally at Wichita, Kansas."
Both the quote and the event are fictitious.
Fact-checking site Snopes says: "Trump did not have a rally in Wichita, Kansas, as alleged by the above-quote, at any point in January 2016."
http://www.bbc.com/news/world-africa-37949183?post_id=1221132834564536_1362484850429333#_=_