Why do Atheists spend so much time debatng the existence of God?

[bladevalant546]

Each religion has their doctrine and the most logical thing to do is go through each claim and come up with your own conclusion. If you don't believe in anyone of them, then at least you tired.

Threat to human reason? Give us examples.

Fair Question, I agree it is good to go through each claim. It is important to find the old question "What is Truth". However, to make such a journey you have to drop all affiliations and bias, or else you will not examine each claim objectively. Also, you have to discount all antidotal evidence, personal experience claims, and presuppositions in order to make an objective analysis. While you will claim you have objectively analyzed your faith. I feel from my own claims when I was a Christian, you have avoided the toughest issues pertaining to your faith. I am not saying this to make you doubt (as it is not my intention to tell you what to believe) I hope you understand that your lenses that you see world through is fueled by a deep need and only a stimuli that equals or surpasses that need will make you see the world more objectively.

Now the second part of your statement, there is plenty of evidence to support that religious absolutism has affected reason and human mental progress. Islam being the most recent, with their issues of believing in the Hadiths (which are books outside the Quran) and various interpretations we seen this keep the middle east in the dark ages basically. We see the rise of the Young earth Creationist movement born out of the 7th day Adventist Church. Which is totally anti-science and for some reason believed regardless of the mountains of evidence against it. The rejection of evolution (by most Christians) even though it has little to do with religion or god. Religion in politics forcing their religious morals (notice religious morals not evolutionary morals) on the common man, such as abortion (I have my own convictions on that, gay rights, views on the poor, and income inequality that list can go on. Then there is the apathetic view towards the environment as most Christians believe pollution and manmade ecological destruction is a conspiracy. Then finally the indoctrination of children, yes indoctrination will you allow your children to learn of other religions/beliefs in a non-bias light? I can go on however, it would be redundant. While I do not think the beliefs in religion hold things back, it is the activism that a lot of it entails that is the issue here and the claims it publically makes.