The idea that all people are fundamentally equal in the eyes of God was a radical innovation in its time. People living today struggle to appreciate how big of a deal the Parable of the Good Samaritan actually is. Folks who try to paint Christianity as a negative social influence are comparing the real historical Christian societies to a utopia that never was.
“The inhabitants of Africa, where they have equal motives and equal means of improvement, are not inferior to the inhabitants of Europe; to some of them they are greatly superior. … Certainly the African is in no respect inferior to the European. … Freedom is unquestionably the birth right of all mankind; Africans as well as Europeans: to keep the former in a state of slavery, is a constant violation of that right, and therefore also of justice.” - John Wesley
In the 1700s, as Europe developed a new and unprecedented idea of racial inferiority in the halls of government and universities, a great and unprecedented application of equality was brought forth into the world in the halls of the church.
Paganism and the evils brought forth from it are naturally the ways of man apart from God, and I see little authority to argue Christianity in the wrong and paganism - a root of sacrifice, murder, and oppression of every sort - in the right.