Ivan van Sertima's "scholarship" in his "ethnocentric" view of the history of the world has pretty much been dismissed as fantasy and rubbish.
Fine be ignorant. I am a devout Roman Catholic who knows, and I vow not to be ignorant to the adoption of local beliefs by the Church in the greater good.
Believe what you want but those of us who have been trained by the Jesuits have been warned to avoid the ignorant. So I will ignore you.