You seem to forget that God calls us to use discernment...and that we are accountable to one another. When pastors fail to rightly divide God's Word, and do so as publically as Rick Warren, we, as members of the Body of Christ, are justified in calling him to account and to repent.
I have not observed nor read of RW failing to rightly divide the Word of God.
I've read a lot of self-righteous opinions to the effect that he has. I haven't found sufficient grounds to agree with such opinions.
Just because someone has a different emphasis etc. than I is far from sufficient grounds.
RW is VERY ORTHODOX in his theology.