We should not be shocked by the horrific things ISIS does to Christians

Why not?

Because radical Muslims have been doing this to Christians for years, and not just in the Middle East.  And ISIS has been telling the world for several years what it will do in the name of the Prophet.

So the Archbishop of Canterbury and the Pope should not be shocked.  And they should stop avoiding the obvious: these are Muslim acts perpetrated by Muslims in the name of Islam.

So argues Judith Bergman in this compelling article.