I am very familiar with the whole seeker-friendly movement and I agree with your assessment of it. When the church acts as though they can improve on the gospel -- make it more loving -- they are insulting and denying the truth and love within the TRUE gospel. That's how I see it. It is an insult to the high price Christ paid on the cross.
It is both. Actually, I went back and read "Purpose Driven Church" after the other one, because I heard a local pastor refer to it. In that book, Rick Warren advocates that if any of the older "Traditional" members (read: CONSERVATIVE) want to keep their tradional music or beliefs, they are considered "Idolators". I find that extremely offensive, and maintain that those who want to practice only "Contemporary" methods or music must also be considered idolators. Warren is really stretching it with his method. Local churches are taking it to the extreme, literally pushing out members who oppose Warren's views.