You don't consider a lot of things, like context.
Again, the book of JAMES was written by one of the circumcision apostles to the TWELVE tribes of ISRAEL.
That's very important CONTEXT.
God has turned away from Israel during the Church Age, but will return to Israel after the end of the Church Age which will culminate with the rapture.
We see the division between God's dealing with the Jews for 69 weeks, a gap representing His dealing with the Church, and then His dealing with the Jews for the seventieth week in Daniel 9.
Daniel 9
24 Seventy weeks are determined upon thy people and upon thy holy city, to finish the transgression, and to make an end of sins, and to make reconciliation for iniquity, and to bring in everlasting righteousness, and to seal up the vision and prophecy, and to anoint the most Holy.
25 Know therefore and understand, that from the going forth of the commandment to restore and to build Jerusalem unto the Messiah the Prince shall be seven weeks, and threescore and two weeks: the street shall be built again, and the wall, even in troublous times.
26 And after threescore and two weeks shall Messiah be cut off, but not for himself: and the people of the prince that shall come shall destroy the city and the sanctuary; and the end thereof shall be with a flood, and unto the end of the war desolations are determined.
27 And he shall confirm the covenant with many for one week: and in the midst of the week he shall cause the sacrifice and the oblation to cease, and for the overspreading of abominations he shall make it desolate, even until the consummation, and that determined shall be poured upon the desolate.
God has set aside the Jews for now, but will restore them again after the rapture of the Church. According to Romans 11 the Jews are
enemies of Christians for now for the sake of the Church, but they are still God's people and will be restored in the end. I do not believe James and the Jews he was writing to were considered by God and Christians to be enemies of the church at the time of his writing, but were instead saved Jews and part of the Church.
Romans 11
25 For I would not, brethren, that ye should be ignorant of this mystery, lest ye should be wise in your own conceits; that blindness in part is happened to Israel, until the fulness of the Gentiles be come in.
26 And so all Israel shall be saved: as it is written, There shall come out of Sion the Deliverer, and shall turn away ungodliness from Jacob:
27 For this is my covenant unto them, when I shall take away their sins.
28 As concerning the gospel, they are enemies for your sakes: but as touching the election, they are beloved for the father's sakes.