I'm thinking that mainstream "christians" need to prevent this act from happening or they're all equally culpable. Speaking out against it isn't enough! They must prevent the extremism or forever live with the rath that follows.
I fall into that trap often. There are many acts performed by "Christians" that seem very un christ like to me. But, who am I to judge? We have freedom in this country, freedom to burn books and piss others off. I do wonder why some Christian leaders don't speak out against poor behavior in the name of Christ. Their silence seems like tacit approval. They seem very quick with the forgiveness stick with their own, and a bit slow with others.
Equally culpable seems a bit over the top though. How would you suggest they prevent this behavior?