This has some fascinating parts to it.
First and foremost, black Africans have finally realized that Arabs have always, and will always, see them as nothing more than slaves, whether they are pagans, Christians or Muslims. “Islam says that all Muslims are equal. So why are we treated as slaves by our fellow Muslims?”
Meanwhile, Christianity has no slavery, and Christians fight against slavery, even buying freedom for some Muslim slaves.
A recent example of this was in Timbuktu, when the Tuaregs descended on the city, and immediately enslaved free blacks, as did the Arabs who had lived freely with blacks for years, who turned on their black neighbors and abused them. When the French finally routed the Tuaregs, and many of the Arabs ran away as well, the local blacks cheered.
While the city was and is firmly Muslim, the message was not lost on the blacks.
Next, someone cannot just “leave” Islam, because the Muslims will say they cannot, and will still call them Muslim and treat them as such. So to leave, they must convert, and Christianity is the best option. So they can say, “I am *not* a Muslim. I am a Christian!”
Then, the timing of this was nothing short of amazing.
With the huge influx of converts, the Christian churches of Africa were financially stretched thin. But at just the right time, the Anglican church in North America had a schism. Its conservatives, to escape the oppression of its leftist Bishops, took their churches out of the Anglican dioceses, and instead became “African Missionary Churches” for the very conservative African dioceses.
African Missionary Churches filled with middle and upper middle class white people. White people with money, and more than happy to send a lot of it to their African bishops and Archbishops.
Money that immediately went into building church after church for all the new Christian converts. And this was just the Anglicans.
The Catholics, Evangelicals, and other conservative Christian churches have been pouring a river of money into Africa at just the right time, and every penny matters.
In turn, some of the Christian leaders have nations of congregants, and the unsolicited power of princes.
And all the while, Islam hemorrhages. Importantly, the birthrate in Arab nations has plummeted, so their growth that way is also in question in the future.
Also I sense God is preparing missionaries to bring back the good news of the Gospel back to the west.
This has the effect of being the one that will destroy Islam IF we take the opportunity to humiliate Islam utterly and totally. Islam works on being a "join us, we win" religion.