Why do atheists frequent Christian sites?

This has been a question I have asked, ever since I became a Christian.

I have seen the most obscene blog posts one could imagine on Christian sites where we speak of God's miracles and then non-believers or God-haters enter to try detract from what we have to say.

Cars don't interest me, hence I stay away from car sites. Satanism sites offend me, hence I stay away from those. Could it be that the non-believers are actually looking for something to believe in that they can't stay away Christian sites?

Otherwise, based on the tripe they spew out and the attempted character assassination, it would seem they are trying to take Christians away from God. It would take a bit more than that to pull me away from God. Why would they do that, though? Could it be they feel threatened?

The Bible warns that Christians shall be prosecuted, so we expect it - roll with the punches and swat off the flies. After all we know that Isiah 54 says:

15 Behold, they shall surely gather together, but not by me: whosoever shall gather together against thee shall fall for thy sake.

and

17 No weapon that is formed against thee shall prosper; and every tongue that shall rise against thee in judgment thou shalt condemn. This is the heritage of the servants of the LORD, and their righteousness is of me, saith the LORD.

The mere fact that they feel the need to resort to character assassination is a sure sign of fear. Anger stems from fear and I sure would be fearful if I knew in my heart that my false sense of pride and ego would keep me from eternal life.

God lives and the atheists know it. See atheists love to say that Christians are brain-dead. The definition I have heard first was that "atheists hate God" and agnostics don't believe that God exists, however I don't want to put anyone in a category here, hence I went to do some research online. I failed to come up with a conclusive definition. Says one atheist / agnostic writer: "The broader, and more common, understanding of atheism among atheists is quite simply "not believing in any gods." No claims or denials are made — an atheist is just a person who does not happen to be a theist. Sometimes this broader understanding is called "weak" or "implicit" atheism. Most good, complete dictionaries readily support this." In my experience, it would seem agnostics and atheists have many overlapping beliefs. Regarding the "good dictionaries" - that's much like saying that I like a Bible that tells me what I want to hear.

I'll just leave the readers with the question: How do you hate someone you don't believe in?