a strong delusion

This is an excellent film.

"They are from the world; therefore they speak from the world, and the world listens to them. We are from God. Whoever knows God listens to us; whoever is not from God does not listen to us. By this we know the Spirit of truth and the spirit of error." 1John 4:5-6

There is no explanation, at least as far as can be surmised this side of heaven, for a certain blindness that appears to surround leaders of otherwise well regarded, substantially orthodox ministries.  

Rather than voice concern regarding Rick Warren's (and a growing number of other Evangelical leaders) problematic theology and 
multi-tentacled ministries, they give approval and succeed in confusing the sheep.  

But soley for God's grace go any one of us.  I have prayed for Rick Warren and other leaders..the culpability as a preacher of God's Word and shepherd of the sheep is ginormous...we all ought pray.
and from among your own selves will arise men speaking twisted things, to draw away the disciples after them." Acts 20:30