These are about the only cogent (negative) criticisms I've ever heard against Christian belief in particular or religious belief in general:
atotalstranger said:
It seems clear to me that the idea that these concepts [of God] grew out of various psychological and sociological phenomena sufficiently explains the formation and development of human god-concepts and religions.
Here, atotalstrager appeals to Freud or Marx. Freud thought that religious belief was a result of the workings of our cognitive establishment, all right, but the modules responsible for religious beliefs are not aimed at truth. Rather, they are aimed at providing comfort in the face of a cold, barren, hostile world. Now that we know this, we should give up childish notions such as religious beliefs.
Marx, on the other hand, holds that beliefs in God are caused by a dysfunctional social order that suppresses or inhibits man's natural reason, which, if it weren't for the dysfunctional social order, wouldn't form religious beliefs at all.
9-10ths_Penguin said:
all claims about the existence of god(s) by humanity were most likely caused by something other than a god.
Here .9Penguin says roughly the same thing but more vaguely.
Nepenthe said:
And I'm a weak atheist when it comces to the deistic concepts of god since there's more you exclude god(s) from leaving their fingerprints on the universe, the less examinable they are and become increasingly removed from any substantial inquiry.
This complaint, that God is "removed from any substantial inquiry" is less impressive IMO. My memory about what I ate for breakfast last week is also removed from any substantial inquiry. Science cannot determine its truth, yet we're not so skeptical of memory. Why, then, this special sort of skepticism for religious experience?
I personally think that belief in God is warranted as a result of religious experience (under the right conditions, which of course are hard to specify exactly or unequivocally). My religious experience IS evidence of a god's existence; whether my testimony is probative or valuable, well, that's another matter. That will depend on my state of mind (not to mention that of my interlocutor) and whether I have the skill to effectively explain that experience.
Part of the problem is that, even if you are convinced that my testimony provides evidence for God's existence, this usually isn't enough to form in the listener the belief that God exists. For that, the listener has to have her own experience. And for that, she generally needs some assistance from those who have had that experience (not to mention a genuine interest in having the experience -- as the Good Book says, God resists the proud).