It's strange that in an age when we pride ourselves on our independence of thought we meekly submit without further question to the declaration of a clearly unbalanced nineteenth century philosopher that God is dead! That's cheeky, of course - and one rarely comes away from reading Nietzsche without learning something new and significant. He's certainly FAR more unsettling for faith than any contemporary atheist I know of.
At a theoretical level, I think a naturalist approach to religion is just asking questions I'm not interested in. They're perfectly legitimate in their own terms, but they don't address the actual experience of how one or other aspect of religion becomes existentially meaningful to us in our actual lives. The fact that we ourselves are the subject of investigation makes all the difference.
Every stroke a tennis player plays is different, yet we perceive them as playing in a distinctive and unique way. It's what Heidegger called a certain 'how' of existing. It's ultimately always singular, and the double task of (a) getting it in view and (b) communicating it to others will inevitably be marked more often by failure than success!
When I'm on the operating table, I'm happy for the surgeon to treat me as a machine, but the moment I return to consciousness I have other needs and aspirations that should be recognized. We're not here only to survive or extend our individual or species life but to do something seemingly more difficult, for which I've used words and phrases like 'love' and the 'Kingdom of God'.
I think he [Heidegger] sets the question up in a useful way and, despite appearances, he's not 'against' technology. He just wants us to have a questioning and thoughtful relation to it. This must be relevant to any approach.
Essentially I see the new atheism as largely part of the crisis of the left. Having failed to carry through its agenda in relation to political and economic life it's rounding on religion, ignoring the fact that, in some key respects, many believers are likely to share leftist aspirations.
One of the most violent attacks on the Church in the Soviet Union was under Kruschev when, during a period of economic and political liberalization, he attacked the Church to demonstrate to old Party members that he hadn't lost it.
I'm not sure that I 'am' a philosopher - but I do engage with questions that are generally recognized as philosophical questions, such as the character of human existence and what makes for a good human life.
I'm not sure if Cupitt himself still uses this term, but it's useful in suggesting that, actually, there are more choices than the choice between nihilism and faith. In fact, the issue may not be faith as such but the fact that for millennia, Christianity has buttressed itself with a particular kind of metaphysics that has now seemingly reached the end of its life-span. But perhaps Buddhist metaphysics could provide an alternative here - or, at least, offer a direction of travel.
Now, as at the beginning of the 19th century, there is a certain discovery of Eckhart and related figures. There are questions as to how far our Eckhart accords with the real medieval teacher of that name, but there are certainly images in his work that help us work our way past several of the aporia with which we're confronted in our attempts to think about God.
Perhaps - and this goes for the Kyoto School too - one of these insights is that nothingness and unknowing don't have to be equated with a destructive nihilism but with the experience of unity and participation - whilst resisting the tendency of objectifying metaphysics to claim that we can in some way 'know' that this experienced unity is really the truth of how things are, i.e., reveals being itself.
Of course, it's always difficult to disentangle fact from fiction in relation to, e.g., the singularity project. Many scientists I know are dismissive of transhumanist claims, BUT the last 100 years has surely taught us never to underestimate the pace and scope of scientific progress. However, even if much of this turns out to be science-fiction, it also reveals a way of thinking about human life that I find deeply troubling.
Ethics arises in the recognition of our obligation to care for others as beings, like us, exposed to mortality - that is, beings who need our help. Buddhism, not wrongly, extends this to 'all sentient beings'.
In brief, I regard love as a more decisive focus of meaning than death. In terms of Heidegger's argument, this is because I think he misdescribes the importance of the deaths of others and focuses exclusively on my relation to my own death. But, in reality, the deaths of others have a more urgent and immediate impact on our lives than the purely notional knowledge that I too will one day die.
In a sense these are questions that most people ask themselves to some extent. They become philosophical when asked with a persistence and rigour that pushes past conventional or evasive answers. It's nothing to do with acquiring a technical facility in an academic discipline.
Perhaps this is an area where every generation starts from scratch. Although the crisis of the First World War inaugurated an especially strong period of disillusion with regard to the optimism of the previous age, the pattern has repeated itself in many ways in more recent times, e.g., the loss of faith in politics as a means of advancing human well-being. And perhaps this also has to do with basic elements in growing up.
And perhaps this has to do with what I sense is a turning away from the idea of religion as being about conserving a certain heritage from the past towards religion as having to do with how we orientate ourselves to the future, to all we truly long for, to hope.
I still read a lot about teenage angst! Of course, any kind of mourning CAN become pathological and then it 'has to stop', but to move through life untouched by the loss of hopes, beliefs and aspirations once cherished is also questionable.
I'm not sure how far Derrida's later 'theological' interests are really rooted in post-structuralism or whether they don't rather reflect a kind of Kantian-Marxist trajectory - with a French twist on the centrality of liberty, equality and fraternity (cf. Politics of Friendship). Not to mention the role of Levinas and, behind Levinas, Judaism's twinning of eschatology and the call for justice.
What it does remind us is that 'God' is not to be separated from the quest for the Kingdom of God and is not and cannot be the object of any detached 'scientific' contemplation. Heidegger's critique of onto-theology is also driving a wedge between speaking of God and the aims of science - not so as to get rid of God but rather to free God from a false objectification.
However, in brief, I think the connecting of 'God' and 'Being' is one of these things for which there seems to be a natural impulse in human thinking but it can also lead to confusions. Religious believers mostly want to see God as the epitome of what is most really real and in some non-theistic contexts, people talk simply of 'Isness'.
But why should a religious person be interested in a work like Heidegger's that many regard as the epitome of nihilism? For a start, because Heidegger forces us in a way that few philosophers do to really think through the seriousness and all-encompassing nature of our mortality.
Religious life is about something real in human experience that is not constrained by what Wittgenstein called 'all that is the case'. In this sense Heidegger is not simply 'mistaken' - he just asks us, as philosophers mostly do, to think more carefully about what we're saying.
Positively, he [Heidegger] shows that the prospect of death doesn't of itself destroy all possibilities of meaning but calls instead for these to be relocated from fantasies about a future post-mortem life. However, I don't think he does enough in this work to show that this relocation has - I believe - a primarily ethical character (in Levinas's sense of 'ethical').
It seems that just Being, the sheer fact of existence, that there is something rather than nothing, already inspires a wonder akin to religion. But - as in my comment about the Kingdom of God in the last answer - Jewish and Christian traditions are also prepared to challenge what 'is' for the sake of what could be.