WHat do you think is the reason why a friend does this?

Let's say that this friend is a mutual friend of another friend. You have a falling out with these people, or you don't talk tko them anymore. But everyday, one of them always makes an update on their website, telling you what they said behind your back, who they said it to, what people's impression of you really is, etc. And this person does not even go as far as you greet you or give you a chance to talk back to them direclty. What's the problem with this person? At the same time, this person likes to post up material about Christianity, how it's soo good, how it's the best in the world, but he likes to write about what all the church members have been saying about eachother, including their private lives and their personal history. What's the matter wiht this person?