Reacting to the Threat

"...the gospel is more threatening to religious people than non-religious people, Religious people are very touchy and nervous about their standing with God. their insecurity makes them hostile to the gospel, which insists that their best deeds are useless before God. One of the ways we know that our self-image is based on justification by Christ is that we are not hateful and hostile to people who differ from us; one of the ways we know that our self-image is based on justification by works is that we persecute."

        - Timothy Keller, Galatians For You, page 128