queston for Atheist

[Alex K]

How do you explain the start of the big bang?

Currently, a very compelling explanation is a quantum fluctuation of a scalar field (the inflaton) to a higher energy state, triggering a rapid expansion of a patch of space and
subsequent heating via decay of the scalar field. This is all a bit speculative, but it's hard to make definitive statements about this cosmological phase.

there has to be and unCaused first cause.

1. Concerning causality, see e.g. this thread:
http://atheistforums.org/thread-25207.html
Causation and the arrow of time are artifacts of entropy production which are not necessarily applicable to to the question why there is a universe
2. Quantum processes within our universe do not obviously have causes and occur randomly, so your analogy breaks down even within our universe at the microscopic level
3. Even if your assertion were correct, the universe itself would be the most obvious candidate for an uncaused first cause

The beginning of the big bang in a split second threw in the existence of time,laws,matter,physics, everything are universe lives with today.

To the extent that that is even a sentence, it looks like that's what happened...

If the sun was to far away from the earth we would freeze to death, If we were to close the sun we would burn up.

You do know how many solar systems there are in the observable universe, right? It's not like this is the only one...

If the oxygen level wasn't perfect we would either suffocate or have fires everywhere.

The oxygen level has varied very strongly in the past, you know? There was a time when there was barely any oxygen at all, it's only after blue algae started producing it (it was considered a poison back then by most living things), that life started to adapt to it - via evolution, just as ecoli adapt to citric acid in Lenski's lab. Our current oxygen level is not magically set to its value, but a temporary equilibrium which is the result of a feedback loop involving all living things, chemistry, the atmosphere etc.

DNA is extremely complex

It's pretty complex today... that doesn't meant that it started out like that. Unlike what the ID liars tell you, complexity can arise via evolution by natural selection.

everything is designed on a razors edge,

And now you're starting to make stuff up

life demands for a brilliant designer its the only logical way.

More bare assertions...

And in the explosion of the big bang it wasn't just random chaos everything was guided into place,

It was pretty random, and things weren't guided into place by an intelligence, it's just that in our universe the laws of physics are such that structure can form under gravity. In universes where this is not the case, or better, regions of the universe where this is not the case, there are no observers.

what did you guys think everything just happen to be perfect?? I don't have near enough faith to be an Atheist.

Everything is far from perfect. Everything is such that it barely supports life, and in most places it doesn't. This is not what a designed universe looks like, this is what an undesigned universe looks like - just barely suitable.