Has the Pope made any comments about the continuing slaughter of Christians in Africa?
Yes, in the same sermon. Actually called out Islamic terrorism. More than our twice elected leader has ever done.
On Good Friday, Francis chastised the international community for what he called the complicit silence about the killing of Christians. On Easter he prayed that God would alleviate `’the suffering of so many of our brothers persecuted because of his name.”
Yes. See http://www.freerepublic.com/focus/f-news/3275879/posts
'Pope Condemns indifference to Jihadist atrocities against Christians'