African indigenous religions justified and promoted capturing and selling prisoners of war as slaves
how does Christianity promote slavery? Europe got rid of slavery on its own continent when it Christianized
Other than passages that lay out the laws of slavery that Christianity borrows from the Torah?
The European powers certainly outlawed slavery at home, but only after they outsourced the need for slavery to their colonies - and they certainly used Christianity to justify making the African/indigenous majorities an economic and political working underclass in those colonies, not really that far off from the Antebellum slavery and then Jim Crow of the United States.
And even then, they only did so well after they Christianized, literally hundreds of years after they first did so, actually.
I believe in God, but let's keep it a buck here. You don't need to deny or stay ignorant about the history of Christianity as a colonizing and oppressing tool for Western Europe to stay faithful.