The book of James is to Jews under the Law of Moses and is in contradiction to Paul's teaching of grace through faith, without works.
The original apostles continued to the end to faithfully keep the whole law of Moses, including circumcision.
The original apostles never taught that Christ provided a free gift of salvation by dying for the sins of the world.
In the four gospels, the big focus is the gospel of the kingdom, which shouldn't be confused with the gospel of grace.
During his earthly ministry Jesus upheld only what the Law of Moses offered, which did not include salvation by grace.