I do understand that ,and you are correct, to a point, what I am saying is that , the believers of yesterday are not separate from believers today , in the following of God if it be a jew or a gentile, for it is all the same God in the bible we are following, what I am saying, they have there customs ,and we have our ways, but if God himself said or made a point of something he looks on as abominibal, then we as gentiles reguardless of the jewish customs of that day, we are to heed the words of God as his people ,jew or Gentile, this is a clear and common understanding, example ,that if you join a group of vegetarians ,we are not going to be cooking any meat dishes, we will be following the structure of the group or belief, and this is reasonable understanding, and not of any guessing.for no matter what anyone believes , we are still all on the same page, this would be the rules or the laws set , for this group and through out the world , the law will not change and the rules are just that what we know in our hearts and mind to be true , no matter what the dish is going to be.
First off I would like to say that it is God alone who open doors for us to walk through and it is God alone who shuts doors that we cannot walk through. What God opens to us no man can shut and what God closes to us no man can open. We walk through spiritual doors as God opens them for us and the spiritual forces or the gates of hell shall not prevail (overtake or prosper) against the church of Jesus Christ. We are in a spiritual battle every single day as saints from the time we rise in the morning till the time we rises the next morning as spiritual forces of darkness are about us though we don't fight against flesh and blood nevertheless we are in a spiritual battle and we as saints of God either get up every day with our armor on and fight or we leave our armor behind and get wounded. Sometimes fatally wounded because we don't understand the nature of the battle that we are in.