Superstitionist

Our Saviour certainly conceived high indignation and sorrow in his heart, while he observed that scorn and contempt those blind superstitionists, the Jews, bore against the poor despised Gentiles, in thus profaning their place of worship.

Whence it is evident, that the superstitionist must hate and fear the gods.

I think this is just Walker's way of reiterating the often-stated stereotype of the African as an ignorant "superstitionist".

Even if the superstitionists were right and there were signs, omens, portents eveywhere, you'd be none the wiser, because you wouldn't think for a moment that they were aimed at you.

She probably even believed she was a Roman Catholic. But what she really was, deeply and devoutly, was a superstitionist.