If the topic is the relative distribution of non-Christian vs Christian practices amongst the higher and the lower socio-economic groups, there should be significant mention of the luciferian religion practiced by the highest of such strata.
Christianity, at this time, had already incorporated many pagan things ( making pagan gods saints, making pagan "holy sites" Christian ones, and the highest social strata were 100% Catholic, whilst many of non-Norman French/the lowest serfs, still clung to some very old pagan customs.