You are putting two different issues side by side (which is false).
God is the God for the whole human race. That DOES NOT CHANGE THE FACT that the Law (Exodus, Leviticus, Numbers, Deuteronomy) was given by God to Moses for Israel, and it is called "the Law of Moses". Was the Law of Moses applicable to the whole Church? Not at all as revealed in Scripture. And the whole Church consists of both Jews and Gentiles.
ACTS 15: THE YOKE OF THE LAW OF MOSES NOT FOR THE CHURCH
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.
6 And the apostles and elders came together for to consider of this matter.
7 And when there had been much disputing, Peter rose up, and said unto them, Men and brethren, ye know how that a good while ago God made choice among us, that the Gentiles by my mouth should hear the word of the gospel, and believe.
8 And God, which knoweth the hearts, bare them witness, giving them the Holy Ghost, even as he did unto us;
9 And put no difference between us and them, purifying their hearts by faith.
10 Now therefore why tempt ye God, to put a yoke upon the neck of the disciples, which neither our fathers nor we were able to bear?
So you are still trying to tempt the Lord by trying to put the yoke of the Law of Moses back on Christians. In fact after all of this has been recorded, you are ACTIVELY OPPOSING GOD.