I can pretty much summarize why Pastor Cox is having to preach this sermon in the first place. He's preaching it for the same reason the Lord had so much trouble out of Israel, to the point they rejected their (and our) messiah when He was right there in front of them.

Because, the church has been in some form of rebellion and apostacy ever since the beginning of this nation's history. Whenever there's defeat, it's due to sin in the camp. Just look at Joshua and what happened at Ai. Even the fear and lack of confidence is due to the realization that God is NOT with us, and that opens us up to defeat. We are in the last days, where the tares have outgrown the wheat, but because the church leadership does not practice church discipline, nothing is being done to weed out the fakes. This hampers God's ability to work through the church, due to the fact the "leaven" has infected the whole body.