Hmm, It's easy to come across atheist arguments though. It's not like the pope censors forums like these lol. It's just that most people visit the websites that confirm their beliefs and point of view.
Furthermore, there aren't many good arguments against the belief in God.
As a divine being he moves about in the metaphysical sphere, and as Kant tells us, that's out of reason's reach. That's why you cannot prove ór disprove his existence with scientific arguments. You can merely speculate.
For me personally, the biggest counter-argument against the christian view (or the religious view in general) is that it happens to meet all of our wishes. Our greatest wish is living eternally and in good health, religion promises us just that, that can't be coincidence.