They zealously affect you, but not well; yea, they would exclude you, that ye might affect them.
They - your flatterers: in contrast to Paul, who tells them the truth.
Zealously - zeal in proselytism characterized Jews and Judaizers (Galatians 1:14; Matthew 23:15; Romans 10:2).
Affect you - i:e., court you (2 Corinthians 11:2).
Not well, х ou (G3756) kalos (G2570)] - not in a good way or for a good end. Neither the cause nor the manner is what it ought to be.
They would exclude you - `they wish to shut you out' from me (and so from the true Gospel Church, by imposing on you legalism), 'that ye may zealously court themselves,' instead of me.