Offerings to propitiate the dead then were regarded as belonging to the class of funeral sacrifices, and these are idolatry. Idolatry, in fact, is a sort of homage to the departed, the one as well as the other is a service to dead men. Moreover, demons dwell in the images of the dead. ... this sort of exhibition has passed from honors of the dead to honors of the living; I mean, to quaestorships [financial overseers]and magistractes, to priestly offices of different kinds. Yet, since idolatry still cleaves to the dignity's name, whatever is done in its name partakes of its impurity.
TertullianTwo kinds of blindness are easily combined so that those who do not see really appear to see what is not.
TertullianWe say, and we say openly, and while ye torture us, mangled and gory we cry out, "We worship God through Christ!" Believe Him a man: it is through Him and in Him that God willeth Himself to be known and worshipped.
Tertullian