I just came across a provocative little post by a former "rabid anti-Christian, very suddenly convert." His name is John Shore, and he makes some interesting points about the many ways in which Christians fail at being Christians.
Here are a couple of my favorite failures:
3) Too quick to believe that we know what God really means by what he says in the Bible.
5) Too invasive of others generally. It is my personal, humble opinion that anyone seeking to mix church and state has failed to understand the nature and role of either.
You can read the rest of Shore's post here.