This shows either (1) your lack of understand of the Gospel or (2) your inability to see that Peter was speaking by the power of the Holy Spirit on the day of Pentecost. There would never be another Gospel message as powerful as this one, where 3,000 souls were saved and baptized on the same day!Acts 2.38 is not a plan of salvation for today
Acts 2 is as much for today as it was then. Indeed the pattern of the true New Testament church is revealed in this chapter, as is the power of the Holy Spirit.
It is simply amazing how people identifying themselves as Christians try to undermine the Gospel at every opportunity. And that is exactly what this thread is about. Even the Muslims consistently uphold the Koran and brook no criticism regarding its false message.