It is not being mean-spirited, sinfully critical, or downright negative to expose false teachers who pervert the gospel of Jesus Christ (even as Paul does in the Letter to the Galatians). It is an act of love to do so when motivated out of love for Christ, love for the gospel, and love for the souls of people. For to believe a false gospel brings God's condemnation in hell (that's not love). That is why Paul takes so much time in this Letter to the Galatians to establish through his own personal history that the gospel he preached was given to him by Jesus Christ through direct, supernatural revelation—it was not a false gospel of man's innovation which cannot save, but the true gospel which he received by miraculous revelation and which alone can bring salvation (not trivial, but necessary). Paul continues in our text today to present more evidence that the gospel he preached was blessed by certain "pillars" in the Church of Jerusalem (James—the brother of Christ, Peter, and John) who all extended the right hand of fellowship to Paul as a fellow apostle of Jesus Christ. Thus, Paul proves the attempts of the false teachers to divide him and the gospel he preached from the apostles in Jerusalem to be a vain attempt on their part and exposes their lies.