Rick pays lip service to the true Gospel when it suits him. When it doesn't, the Gospel gets jettisoned. Please note that Rick speaking in a synagogue is quite, quite different than the example set by Jesus and Paul.
http://www.jewishjournal.com/home/searchview.php?id=16029
Again, from everything I can tell, the Body of Christ is growing through Rick Warren's ministry. I don't have a problem with that.