If you've been investigating Jesus and Christianity but find the behaviour of Christians a stumbling block, look more closely at Jesus. The only criteria of being a Christian is to admit that we've stuffed up, and aren't perfect people. We are called to be like Jesus, but will always struggle to do so.
Paul, the writer of 2 Corinthians, seeks to not be a stumbling block for others. Through all kinds of struggles and hard times, Paul says to show ourselves as servants of God, showing our hope in Jesus by the love that we show in our lives.