Brief, simple lesson in faith:
God an an entity is not of this world. His exitence occurs on a seperate plane to ours altogether. I actually doubt his existence cannot be proved through methodolocial, scientific or mathematical principles. Its not like I can say because X > Y and Y does not equal Z therefore God = true.
Now I know I can't make the arguement, "because you can't prove he doesn't exist therefore he does", because the burden of proof is upon those who assert God does exist. However a lack of cold, hard scientific evidence to support the assertion that He does exist, does not mean that He does not exist. It simply means that as humans we have no evidence to prove either case, that is the only conlusion possible.
As such, you may have severe doubts yourself about the existence of God, but you will never be able to disprove Him, only convince others, and promote similar doubts in them, but this once again proves nothing, except that more people don't believe in Him than those who have faith.
This entire debate in the typical sense is meaningless in this regard as it cannot be proven beyond all reasonable certinty that God either exists or He doesn't.
Interestingly however, despite this, many of these and similar threads (lets all prove God doesn't exist etc.) are not started by people who believe in Him. Usually, it is those who believe in the assertion being made who would commence such such debates, but IDC that's a side point, just something I noticed.
The Christian faith asserts that God created man in his own image, to have a loving and real relationship with. This explains why God granted humans the gift of free will, something animals do not have. God gave them rules by which to live by, but being imperfect beings humans inevitably fell short of these rules and were tempted by evil away from Him.
Over time however mankind was increasingly tempted away from the one true God, and into lives of sin. This is documented in the Bible (should you choose to accept it), for example in relation to the city of Sodom, which was burnt to the ground, its sinful occupants destroyed for their perverse actions etc.
Gods harsh stance against sin may seem extreme (especially for a supposedly loving God), but is wholly justified, as man was created in God's image, and so, the misuse of the gift of free will to as a means to callously reject God from their lives and live against his rules is abhorrent and completely unjustifiable. As God is the creator of mankind, he would obviously hold to right to enact punishment and/or the destruction of individuals who have disobeyed His commands and rejected His love.
God however did not want to have to kill peole for their sins. This is because He loves us all as His blessed creations, made in his own image to live in a loving relationship with Him. Thus he sent Jesus down to reducate mankind about Him. Jesus died on the cross, to redeeme us from punishment for our sins. This does not mean that sin is allowed, simply that if we accept Christ as our Saviour and seek redemption through him from God, we will be forgiven for being tempted into evil.
It is up to the individual's faith in God, which will or not lead to that individual's salvation, which is the cornerstone of the Christian faith.
The individual has always had the option to abandon and reject God since the beginning, even the first people, Adam and Eve chose to disobey God.
God gave us free will because he wanted to have a loving relationship with his creations. He cannot have such a relationship, built on the foundation of "true" love with us, if we had no free will and couldn't not love Him.
I'm not trying to preech via the internet (you're choosing to read this post BTW), I'm merely demonstrating the futility of this debate, by explaining the bare basics of the faith to those who are unaware and willing to listen.
God will always love you, and you will always be forgiven for your actions, however heinous and evil they may be, if only you belive in Him and ask for his forgiveness
Be cool everyone.