And as many as walk according to this rule, peace be on them, and mercy, and upon the Israel of God.
As many - contrasting with the "as many," Galatians 6:12. rule [canon] - a straight rule, to detect crookedness; the rule of faith.
Peace - from God (Ephesians 2:14-17; Ephesians 6:23), the effect.
Mercy (Romans 15:9) - the cause.
Israel of God - not the Israel after the flesh (1 Corinthians 10:18), among whom those teachers wish to enroll you, but the spiritual seed of Abraham by faith (Romans 2:28-29; Galatians 3:9; Galatians 3:29; Philippians 3:3). The "and" may imply that as the former clause, "as many," etc., refers to Gentile believers, so "the Israel of God" to Jewish believers. But "and" may be explanatory: even.