From a new report, "What It Means to Be American: Attitudes in an Increasingly Diverse America Ten Years after 9/11," by Brookings and the Public Religion Research Institute:
[I]t is obvious that Christians can commit murder, assault, etc. They do so every day. Because, as Christian orthodoxy tells us, we are all sinners. To say that no Christian can ever commit murder is a sophist's piffle. Did Scott Roeder stop being a Christian when he assassinated a man repeatedly demonized by Bill O'Reilly, George Tiller? Do the countless criminals who have gone to church or believe in Jesus immediately not count as Christians the minute they commit the crime? Of course not. What O'Reilly is saying is complete heresy in terms of the most basic Christian orthodoxy.