What was the Galatian church being bombarded with compared to the Corinthian church?
The Galatian churches were being bombarded with legalism, whereas the Corinthian church was being bombarded with the temptations of paganism, immorality, and similar pressures. Both groups faced bombardment, but the Galatians' danger centered on legalistic teaching while Corinth's danger centered on pagan moral temptations.
Les explains this contrast while teaching 2 Corinthians. He notes that the Galatian churches were being bombarded with legalism, just as the Corinthian church was being bombarded with the temptations of paganism, immorality, and so forth. This helps explain why Paul expresses fear for the Galatians, saying he is afraid of them lest he have bestowed labor on them in vain. The Galatian problem was legalism; the Corinthian problem was pagan immorality.
But I certify you, brethren, that the gospel which was preached of me is not after man.