Pretty simple if you walk in the Spirit. Romans 15:7-9 set the stage:
7 Therefore, accept one another, just as Christ also accepted us to the glory of God.
8 For I say that Christ has become a servant to the circumcision on behalf of the truth of God to confirm the promises given to the fathers,
9 and for the Gentiles to glorify God for His mercy; as it is written, Therefore I will give praise to You among the Gentiles,And I will sing to Your name.
Any Christian should know we are blessed through Israel, as the Lord Jesus is the seed of David that now reigns. When we realize Christ made Jews and Gentiles ONE...the body of Christ should support one another as ONE.
Paul is returning to Jerusalem, and he shares how Gentile saints are pleased to give to the needs of the believers at Jerusalem, and he shares that they understand they've received spiritual blessings through the Jews.
The apostle shares this continuously as he constantly preaches to help the church to understand in Christ there's no difference.
Paul consistently does these things because he's aware of the Judaizers, who follow behind him everywhere he goes trying to deceive believers, that they must observe the OT Laws, which is false under the New Covenant.