Arguments against existence of God.

[Jehanne]

I don't know where you are getting your information; even if true, the majority to most scientists are atheistic:


Wikipedia -- Demographics of atheism: Geographic distribution

Ditto for most philosophers:

The Largest-Ever Survey of Philosophers: What Do They Believe?

It's immaterial whether majority of scientists are atheists or not. The point is that majority of cosmologists and physicists acknowledge the truth that the universe is not eternal, and they generally agree that they have no solid explanation for how and why the universe came about.

They say that the beginning of the universe is a "singularity". Now it is all theoretical, based on mathematical formulas and so many assumptions.

Even these atheist scientists are forced to admit that the questions about the nature of the cosmos and how it came into being naturally lead to belief in God, as Dawkins said:

I think that when you consider the beauty of the world and you wonder how it came to be what it is, you are naturally overwhelmedwith a feeling of awe, a feeling of admiration and you almost feel a desire to worship something. I feel this, I recognise that other scientists such as Carl Sagan feel this, Einstein felt it. We, all of us, share a kind of religious reverence for the beauties of the universe, for the complexity of life. For the sheer magnitude of the cosmos, the sheer magnitude of geological time. And it's tempting to translate that feeling of awe and worship into a desire to worship some particular thing, a person, an agent. You want to attribute it to a maker, to a creator.

I think that you are taking Dawkins out of context.  Read his The God Delusion sometime, which I just saw on the shelves of Barnes & Noble here recently!

As for the Universe being "not eternal", if you read Fundamentals of Physics by Halliday, Resnick and Walker (voted by the APS as being the greatest undergraduate physics textbook of the 20th century), they say that speculating what came "before" the Big Bang is a meaningless question, that is, nothing came before the Big Bang.  This is, of course, a very old observation.