ACTS 15: DO NON-JEWS NEED TO BE CIRCUMCISED ?

Acts 14:27 And when they were come and had gathered the church together, they rehearsed all that God had done with them and how he had opened the door of faith unto the Gentiles.

Acts 15:1 And certain men which came down from Judaea taught the brethren, and said, Except ye be circumcised after the manner of Moses, ye cannot be saved.

Acts 15:5 But there rose up certain of the sect of the Pharisees which believed, saying, That it was needful to circumcise them and to command them to keep the law of Moses.