That’s not what the passage teaches. You clipped two verses out of context:
10:23 “Everything is lawful,” but not everything is beneficial. “Everything is lawful,” but not everything builds others up.
10:24 Do not seek your own good, but the good of the other person.
10:25 Eat anything that is sold in the marketplace without questions of conscience, 10:26 for the earth and its abundance are the Lord’s.
10:27 If an unbeliever invites you to dinner and you want to go, eat whatever is served without asking questions of conscience.
10:28 But if someone says to you, “This is from a sacrifice,” do not eat, because of the one who told you and because of conscience –
10:29 I do not mean yours but the other person’s. For why is my freedom being judged by another’s conscience?
10:30 If I partake with thankfulness, why am I blamed for the food that I give thanks for?
10:31 So whether you eat or drink, or whatever you do, do everything for the glory of God.
10:32 Do not give offense to Jews or Greeks or to the church of God, 10:33 just as I also try to please everyone in all things. I do not seek my own benefit, but the benefit of many, so that they may be saved.”
http://net.bible.org/#!bible/1+Corinthians+10:23
What is the purpose of refraining from eating meat offered to idols *if* an *unbeliever* brings it to your attention? That the unbeliever will repent and become a believer.
***That’s not what the passage teaches. You clipped two verses out of context:***
I think you misread what I meant. In the Pagan world almost all meat in the market place had been offered on alters to various gods, then sent to the market place to be sold.
You go, buy some meat and don’t ask questions. If you were told the meat had been offered to idols, even in a feast, you don’t partake of it! and if you did, it showed the seller or host that you approved of the sacrifices. Any other Christians seeing you eat the sacrificed meat would conclude you were not a true Christian. So, YOU DON’T PARTAKE if you know it is a sacrifice.
Buying halal meat from a moslem meat shop shows the seller you are accepting moslem dietary rules.