Belonging 2
Gal 3:28,29
There is neither Jew nor Greek, slave nor free, male nor female, for you are all one in Christ Jesus. If you belong to Christ, then you are Abraham’s seed, and heirs according to the promise.
The Jewish legalists attempted to give Gentile Christians the sense that they were still outsiders - strangers to the promise, which in fact was the case prior to their becoming Christians as Paul himself wrote, "at that time you were without Christ, being aliens from the commonwealth of Israel and strangers from the covenants of promise, having no hope and without God in the world." Eph 2:12 But Paul's point is that having become Christians they now do belong, as he said, "Now, therefore, you are no longer strangers and foreigners, but fellow citizens with the saints and members of the household of God." Eph 2:19
Because all Christians equally belong to Christ, regardless of cultural background, gender, social status or the like, the Christian community should be free of prejudice. The legalists may have been arguing that the Gentiles had to become Jews to become Christians. But the fact is that Christians are already Abraham's seed through faith - apart from the Law of Moses. In fact it is the Jewish legalists who are not Abraham's seed and are therefore disqualified from the promise.
Likewise there are alleged "Christians" today who will treat legitimate Christians as if they were still outside the body. Like there are those who may say of those who are not members of their particular denomination that they are not legitimate Christians.