Paul's Tension in the Letter to the Galatians

Paul is the one message guy. I determined to know nothing but Christ and him crucified, right? And so his primary concern is that you are believing some other message. He doesn't react nearly as harshly if there's moral failure. If he knows he's dealing with real human beings that are going to sin and struggle and fall short, Paul can deal with that. What he really gets angry about in the letter to the Galatians is when they're seeming to believe something other than the truth of Christ crucified.