These usernames are clearly going to be offensive to a large number of people. I had assumed that Stack Exchange had a policy when it come to usernames. Is that the case? If not can we set one up?
I also notice that it is not possible to flag a user. I flagged one of this user's posts. Is that the appropriate way to draw an offensive username to moderator's attention?
This isn't part of the question, just my own observations. Wikipedia has a pretty decent username policy, and if we don't have one then we should look to that as a model.
Since there seems to be some confusion here, I'm not claiming that all people called "Jesus" or "Mohamed" should not be allowed to use their name. But "Jesus Christ" is clearly a reference to the religious figure.