You want to be a more normal country. You WANT diversity. You want those back home in Africa to see how humanely you treat these Africans and they'll come over to your side on the diplomatic front. Many will ultimately convert to Judaism too, and you know it. Contrast your treatment of these folks with the barbarism of the Arab countries. People will notice. It's not like you can't use some positive PR once in a while. So what's the problem?
Fire in Jerusalem suburb causes severe air pollution (Haaretz)
from the article: Israeli MKs engage in stormy debate over African asylum seekers