I believe that those who believe in the Bible don't necessarily arrive at their beliefs in the same way. Some may have been taught it at an early age, and just carry their "religion" into adulthood. Others, however, have fallen down in their lives due to some cause such as drugs, booze, a life of crime, or whatever. Many of these people have turned their lives around only because they found salvation with God. For them, being "saved" was their only way out of their despair. Many of them have tried everything else, even other religions. It is with these people that you will NEVER convince that God doesn't exist.
Sure, anyone can "experience the moment" at a ceremony, or get engrossed in the intensity during services. But there are those people who have hit rock bottom and felt despair and hopeless, and felt God touch their heart and change them from the inside out. Many of these people forgot how to love someone else, many have been obsessed with anger or hatred, or have lived a live of debauchery for so long that they felt that they no longer had any value as a person. The power of God filled a void in their hearts where nothing else (drugs, money, women, fame, power, other religions, booze, etc...) could. Its these people who believe when the Bible says, "Jesus died for the ungodly", it was meant for them.
Its these people who will say, "I KNOW that God exists, because He touched my heart and turned my life around". Then you will have the others who will say, "I know he DOESN'T exist, because he hasn't done shit for me and the world is in turmoil". And then you will get those who will say, "I'm a religious person. Its all about following the rules of my religion".
Well, when it comes to the Bible, who was against organized religion? Jesus was. The mormons coming to your door and trying to predict prophecys. The catholics confessing sins to a priest. The jehovahs witnesses, and the rest of them that proclaim that its THEIR way or no way, Jesus was against ALL of that! Despite what the religious zealots want you and their followers to believe, here's what Jesus said about the subject:
On one occasion an expert in the law stood up to test Jesus. "Teacher," he asked, "what must I do to inherit eternal life?"
He replied, "What is written in the Law? How do you read it?"
He answered, "'Love the Lord your God with all your heart and with all your soul and with all your strength and with all your mind'; and, 'Love your neighbor as yourself.'"
"You have answered correctly," Jesus replied. "Do this and you will live." (Luke 10:25-28)
It doesn't say a thing about persecuting others, hating those who don't share your beliefs, telling others that they are "wrong", feeling superior over others because your "saved" and they are not, killing in the name of "God", forcing your beliefs on others, oppressing, or all the other bullshit that people have done throughout history in the name of religion or "God".
So what does the Bible say about "religion"? "Religion that God our Father accepts as pure and faultless is this: to look after orphans and widows in their distress and to keep oneself from being polluted by the world.” In other words, as I see it, "provide for others who cannot provide for themselves, and don't get caught up in things like booze, drugs, debauchery, perversions, crime, etc..."
So when you get on a forum such as this one and question people's sanity in having the same beliefs as the woman who went on CNN and talked about hating and killing homosexuals, the same beliefs as a president who believes that "God" told him to go to war, the same beliefs that a priest who molests children has, the same beliefs as someone who comes to your door to tell you that your going to hell if you don't practice the same religion he does, the same beliefs as someone who doesn't give their kid medical attention because its against their "religion", the same beliefs as an evangelist who rakes in millions a year in donations from preaching the "gospel", maybe you should instead question whats in that person's heart.
Because when it comes right down to it, despite the people's actions in the name of "God" throughout history, all the Bible says is to be good in your heart. I don't care if someone is muslim, christian, jewish, athiest, buddist, or worships a statue of Joe Pesci, if he's genuinly kindhearted, he's OK in my book.