I find that such bizarrely aggressive and unsupported insults tend to say more about the accuser than the accused.
Read Paul Johnson's "Intellectuals" and look at the atheists that you know. It's one long rationalization for personal misconduct.
Or look at it another way. It's a fact that people who attend Church regularly live on average 7 years longer than those who don't. Now this can be explained in one of two ways. Either there is a God and He generally rewards those who seek Him with longer lives, or Churchgoers are healthier because they refrain from unhealthy vices; i.e., they generally lead more virtuous lives.