Young0ne, welcome firstly to the forums. It's good to have you here, and never think your questions are irrelevant. Whether we are believers or not, whether we are older or younger and whether we are Christian or not, is so irrelevent. What is totally relevant is your question.
I was reading Galations chapter 2 these past mornings and do you know something... even the apostles, the cornerstones of the faith in the early church were called hypocrites. Read Galations 2:11-19.
You see all those verses you quoted discuss rules and laws which were given to show us not only the right way to live, but the total impossibility of living them out in this world. Jesus said that the law was given to show the world it's need for him. In not being able to live up to the requirements of the law, we are thrown on God's mercy for salvation and forgiveness
The Jewish disciples tried to follow the law as believers and ordered even non jewish believers to follow that pattern of worship as the only way to worship and act, and Paul called them hypocrites. Why? Was being a Christian a license to act as they pleased? Of course it wasn't! Any true believer aches to please their Lord and do the things he wants, but the condemnation was that in making someone act or worship in a certain way we are saying that it's the Law that saves and not faith. (see Galations 2:17). What does it mean to be a hypocrite?
In this passage, Peter was eating and fellowshipping with Gentile believers having been convinced in Acts 10, that the Gospel was for both Gentiles and Jews. As a Jew himself. we have very little understanding of what this revelation cost Peter personally. We do know, that as a Jew, this was almost an unspeakable revelation, and he initially responded with suprise and then surrender to it as the will of God, demanding a total behaviour and attitude change on his part
Yet, when the Jewish believers arrived, he immediately sought to please them by separating from the Gentile believers. He was a pleaser of man and not of God and Paul called him a hypocrite. You see, God had convinced him of truth, and Peter's hypocrisy was to turn his back on that truth and act the way he thought the Jews would want him to act, even though it was contrary to God's revelation to Him.
So, how are we as believers being hypocrites? It's when we know God requires something of us.. action, thought anything, but in the end fear of man leads us to act differently to what we know God is showing us. Hypocrisy is deliberately disobeying the truth of God as we know it. It is pleasing man rather than pleasing God.
Any of us can fall into that trap. See, it's not about being perfect "angels" in our actions and living totally by the Law. Sometimes God's revelation might seem to go against the letter of the law, but will never go against the principle of the law. (The Law was given so that people would live lives that were recognizably different and honouring to God.. to show themselves a people separated to God, who God would bless and show his love to, so that the world would know that God is the God of the whole world (Genesis 12, 17) as believers, we are called to be this same set apart people)
Hope this helps, I'm still a bit muddle headed at the moment. jet lag has it's problems.
Carol