For a long time something has puzzled me about evangelical forms of atheism. What is it they are really objecting too? For I suspect it is not actually belief in God.

My puzzlement stems from the way the otherwise rational, intelligent, even charming advocates of godlessness seem blinded when the searchlight of their minds turns to religion.

Sure, religion has cultivated violence and harm, but so have materialist ideologies. Sure, there is no indisputable evidence for God, but then the study of empiricism suggests that there is at least a question-mark over what sensory evidence can achieve when it comes to the divine. Sure, believers tend to respect religious authorities, but they go to church for far more profound reasons than simply to be told what to do; witness Catholics and contraception!

But listening to the Intelligence Squared debate crystalised something for me. The atheists there had the better arguments, bar perhaps those put forward by Roger Scruton. But I suspect the thing that fires their passion is not ideas about God. After all, although they could, they simply don't take theology seriously. Rather, it is what they fear religion implies about being human that raises their ire.

Implicit in their reaction to religion is a model of human being that is an idealised Enlightenment figure: rational, autonomous, mature and independent. They fear that religion makes people irrational, herdish, infantile and dependent.

Now sometimes, at the very least, people are irrational, herdish, infantile and dependent. And the best Enlightenment figures recognised this. What are Kant's Critiques if not careful assessments of where reason falls short? What is Hume's sympathy and fellow-feeling if not dependency as a moral principle? What are de Sade's fantasies if not warnings against infantile desire ignored? Personally, I dislike herdishness most, though only because I recognise the herd instinct in me.

So the risk these atheists run is propagating a deluded humanism. Their figure of 'Enlightenment Man' is a distortion of Enlightenment insights. Conversely, religion, riddled with ambiguities, is so precisely because it can take the irrational, herdish, infantile and dependent tendencies of human beings seriously. At best, it mitigates their excesses and provides means for redeeming them. At worst, of course, it does exactly the opposite.

This is why the great challenge for believers today is to cultivate good religion over bad. To those, like myself, who are ambivalent about religion, it is to come up with an alternative that is humanly as rich. I don't believe it has been done yet!

It is this that the evangelical atheist seems to have given up on. Instead, they adopt an anthropology that is radically simplified, Richard Dawkins' 'people as gene-machines' being a good example. With their undoubted cleverness, displayed as a force of rational will, the hope seems to be that human beings can simply sidestep their supposed 'Enlightenment failures'. That people don't, can't and at least in part shouldn't - because these qualities are integral to human loving, laughter and lament - is actually what annoys them. This puts them in a bind, since, being humanists, they don't want to appear misanthropic. So they take their frustration out on religion instead.

Which is ironic. Since it is precisely then that their own most irrational, infantile tendencies become clear to on-lookers, manifest in their rhetoric. Though at least we then see them as human too.