Also I will be honest with you, I have good Christian friends.
Also every thing in this world shows that there is God.
So why should I deny the idea of God existance.
Most probably those who do not want to believe in God thinks that believing in God will restrict them.
If some one ask me why you do not drink alcohol or wine?
I will tell him because God prohibitted drinking alcohol, I will not tell him because it is not good for liver.
Suppose some was drinking alcohol and then he had a liver disease because of the alcohol, then he will say alcohol is bad because it brings liver disease.
Before one week on Al Jazeera there was a program showing that the number of people in UK having mouth cancer is increasing and it is due to drinking alcohol and smoking cigarettes.