I read this point on the forum some time ago. I believe it was Auld Soul who wrote it. But, I could be wrong about that.
What mistakes did the first century christians make after Jesus sent the helper (Holy Spirit) to them?
All of their mistakes and misunderstandings about what Jesus said and meant happened before the Holy Spirit came and made all things clear.
John 14:26 "But the Counselor, the Holy Spirit, whom the Father will send in my name, will teach you all things and will remind you of everything I have said to you." (NIV)
There was a running disagreement between some regarding physical/spiritual circumcision, however, that wasn't something they decided one way and then changed their mind on nor was it something individuals were kicked out of the congregation for.
There may be other scriptures that are more pointed that I can't think of right now.
If there is a witness rebuttal to this argument I would love to hear it so I can think of a rerebuttal.