Here is a great follow up to James White of Alpha and Omega Ministries' concern over Rick Warren's capitulation to Rome part 1. He examines the Judaizers of Galatians and shows that even a minute change in the Gospel of Christ is a total abandonment of that Gospel. The strongest language in the New Testament is spoken against those who pervert the Gospel. Compared to much of today's professing Christianity, the Judaizers look extremely conservative and even almost orthodox, and yet Rome makes the Judaizers look like amateurs in perverting Christ's Gospel.
The video is 14 minutes and White also has good words for how to comment on the situation (hint: not angrily nor arrogantly) and he also expresses a biblical stance on why we should be concerned when we do speak up over these matters.
A commenter on the first video kindly posted this link to this follow up. Thank you.