That doesn't really follow though, does it? You haven't shown that the world is poisonous when theism is rejected, just that following a religion seems to correlate with benefits for the user, and that a high IQ correlates with things you consider negative.
So, what you haven't done is shown either that atheism is poison, or that rejection of religion is poison.
Edit: God, why does posting on this board make me feel like I'm marking undergrad philosophy papers?
Pointless barbs aside lets look at the definition of poison.
http://dictionary.reference.com/browse/poisonnoun
1. a substance with an inherent property that tends to destroy life or impair health.
2. something harmful or pernicious, as to happiness or well-being:
That also applies to religion. If you think atheism is poisonous, then you must think theism is just as poisonous. There's certainly much more historical evidence of religious persecution.
Theism posits a god. Atheism not "anti-theism" in the same way that amoral is not "anti-moral". Regardless of historical accident or human preference, the scientific preference is for any additional hypothesis (eg there is a god) to be proven. "Atheism" does not require any additional hypothesis, since there is no proof the theist position reflects reality.
Therefore the "theist" frame of reference -- regardless of how long it has been around, or to which authorities you appeal -- is one that should be considered hypothetical until proven otherwise.
Multiple studies of fertility show that those who have adopted the atheist philosophy have a fertility rate that drops below 2.1 the minimum needed for replacement of the population. Atheist have also been shown to report significantly lower levels of wellbeing compared to the highly religious.
Significantly? What is the p value on that? How did you get "significantly" out of that study? You certainly didn't quote any stats.
I provided multiple other more abstract and anecdotal examples of toxicity in the OP. From this follows the conclusion that the adoption of an atheistic worldview is likely poisonous to homo sapiens.
If you're trying to prove that a minority of the population is evil and poisonous, you'd best use very clear and well documented experimental evidence only, instead of anecdotes. Use of anecdotes taints the reading of the experimental evidence you've included.
If you'd written all that about some other minority, this post would have been labelled "hate speech" regardless of how much anecdotal or abstract evidence you have.