I think you are missing the big difference between Paul and Peter. Peter was never a Rabbi. All of his schooling was at the feet of Jesus and from his childhood, and yet he was the Apostle for the Jews.
Paul, on the other hand, was Pharisaical scholar and yet he was chosen to be the Apostle for the Gentiles.
Two completely different groups of people so we have two apostles treating each culture completely differently. Is this wrong? No. Christianity was never about social conformity, but rather blending INTO society. Every other social issue PALES by comparison to seeking and saving the lost. Here is Paul's take on this phenomenon:
I Corinthians 9:19 Though I am free and belong to no man, I make myself a slave to everyone, to win as many as possible. 20 To the Jews I became like a Jew, to win the Jews. To those under the law I became like one under the law (though I myself am not under the law), so as to win those under the law. 21 To those not having the law I became like one not having the law (though I am not free from God's law but am under Christ's law), so as to win those not having the law. 22 To the weak I became weak, to win the weak. I have become all things to all men so that by all possible means I might save some. 23 I do all this for the sake of the gospel, that I may share in its blessings. NIV
Galatians 2:8 For God, who was at work in the ministry of Peter as an apostle to the Jews, was also at work in my ministry as an apostle to the Gentiles. NIV
Unfortunately, modern day disciples seem to be searching for a rigidity in our collective beliefs. They want to make us CONFORM to their opinions and beliefs and they even try to couch them in Biblical terms. Take the issue of alcohol. How many churches repudiate anyone who inbibes, and yet Jesus was often called a drunkard. They have gone the way of the Pharisee in desiring to set themselves apart by OUTWARD appearances. Rather than being inclusive like Jesus, they draw all sorts of lines in the sand that only serve to STOP belief in those who aren't exactly like them.
It's insidious and can be seen in something as simple as praying before each and every meal. That hearkens back to the Pharisees who prayed where??? IN PUBLIC. Why? So they can be seen as being pious by men. I would suggest that you are doing more HARM than good by creating these false appearances. What is important? Nothing but faith being expressed through love (Galatians 5:6). How is the world SUPPOSED to know we are Christians? It's not supposed to be by our intolerance or hate, and yet this is the very thing we are all known for! No, we are to be known by our LOVE (John 13:35).