Rick Warren, pastor of Saddleback Church in California, and author of the best selling Purpose Driven Life, is an apostate. There is no other word to describe his defection from the truth.
According to Warren, Christians and Muslims worship the same god. This is simply false. Add to this his support and efforts toward ecumenical parity in a fusion of the two faiths called Chrislam and it's clear that apostasy has taken root at Saddleback Church.
Warren has, of course, vehemently denied any support or affiliation with the Chrislam movement (and it is a small movement), but if he truly believes Christians and Muslims worship the same god, then there is virtually no difference between one and the other. If there is no difference, then converting to Chrislam is the natural progression of faith for both Muslims and Christians.
But there is only one God. And His name is not Allah... it is YHWH, Yahweh... or Jehovah. There is no hope of life beyond this present world without Jesus of Nazareth-- the son of the living God --and His sacrifice. There is no atonement without the shedding of blood. And there is no blood efficacious enough to cover any man's sins, let alone the sins of the entire world and history of men, but that of Jesus alone.
Rick Warren needs to rethink his stance, and repent.