Fornication is a sin.
There is only one God. (Belief in any other is the sin of idolatry.)
Fornicators and idolaters are unrighteous.
It's not enough to know the idol is nothing (to not worship it--to not be-
lieve in it as God) and that Christians
aren't given credit for eating, or
blamed for not eating, foods. Christians should love God and take care regard-
those who don't know that there is one God, the Father, and one Lord, Je-
sus, and would, in worship, eat idol temple meat
as a sacrifice to an idol.
Christians should avoid eating in that circumstance if they would be mistaken
by such others
as encouraging worship of idols, idolatry, which would be a sin.