FSSL said:
Prevalent or not, ANYTHING can be an idol. Objects become idols when conduct goes awry.
True enough, anything can become an idol on the personal level, but anything does not have societal/cultural impact. The passage is dealing with idolatry at the societal level that has so permeated the culture as to be a normal part of commerce ("
sold in the shambles") and custom ("
bid you to a feast and ye be disposed to go"). It is the identification of the church of God and the individual believer with this idolatry through incorporation of these pollutions that is forbidden in Acts 15, applied here in I Cor. 6-10, and further condemned by Christ via the Apostle John in Rev. 2.
With 7 billion people in the world there is likely somebody in a cave somewhere that worships ducks, but there is not a culture where duck worship is prevalent. OTOH, most societies/cultures of the world are defined by what they worship and how, such as India, China, Kuwait, Poland, etc. Corinth was identifies by its worship of Aphrodite, Ephesus by Diana, the USA by something else. If the culture is not Christian it is either Jewish or idolatrous. We are not Christian, and we are not Jewish. Therefore, identifying the prevalent idolatries is important. Syncretization is not a Biblical option.