I asked myself what in the main reason I do not believe in god? What is the reason that personally convinces me most? I think it is this: There are 10,000 gods, all equally absurd, yet all at some time taken completely seriously by someone. People always champion the existence of the god pushed on them in infancy. There is nothing inherently special about any particular religion. They all disagree. They are all based on speculation. There is no evidence to support any of them. They all conflict with science and common sense. None can show me any artifact that could not have been created by man. They are all parasites on their host societies in other words, cons. At least 9,999 of the religions logically have to be false. They cannot all be right. There is no reason to imagine one of them is any better than the rest, so they are almost certainly false. Even if one of them were the true religion, the odds of it being Christianity would be only one in 10,000. I have studied a number of religions and I would put Christianity at the bottom of the heap in terms of it likely being the true religion. Christians think it is so wonderful only because they have refused to look at anything else. Christians are the most hardened atheists when it comes to any other deity but Jehovah. Christians never give a reason for rejecting the 9,999 other gods, yet demand we atheists jump through hoops to reject Jehovah. They even reject Allah who is just Jehovah with a new name.
What is your #1 self-convincing reason, either against or for the existence of god?