There is no indication that the entire Jerusalem church was offering sacrifices in the temple or requiring circumcision. There were some who were pushing these things, but it was not all of the church in Jerusalem.
Also, Paul does not say there are two gospels here in Galatians. He is saying that taking the Gospel to the uncircumcised was committed to him, and that taking the Gospel to the circumcised was committed to Peter.
***There is no indication that the entire Jerusalem church was offering sacrifices in the temple or requiring circumcision.***
Act 21:18 And the [day] following Paul went in with us unto James; and all the elders were present.
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Act 21:20 And when they heard [it], they glorified the Lord, and said unto him, Thou seest, brother, how many thousands of Jews there are which believe; and they are all zealous of the law:
Act 21:21 And they are informed of thee, that thou teachest all the Jews which are among the Gentiles to forsake Moses, saying that they ought not to circumcise [their] children, neither to walk after the customs.
Act 21:22 What is it therefore? the multitude must needs come together: for they will hear that thou art come.
Act 21:23 Do therefore this that we say to thee: We have four men which have a vow on them;
Act 21:24 Them take, and purify thyself with them, and be at charges with them, that they may shave [their] heads: and all may know that those things, whereof they were informed concerning thee, are nothing; but [that] thou thyself also walkest orderly, and keepest the law.
Act 21:25 As touching the Gentiles which believe, we have written [and] concluded that they observe no such thing, save only that they keep themselves from [things] offered to idols, and from blood, and from strangled, and from fornication.
So, who gave these orders? James and the elders of the Jerusalem church.