Liberal Christians are slippery beasts. So slippery, that it is incredibly difficult to discern what, tenets of Christianity, they actually believe. Of if they believe any of them at all. Trying to pin down a Liberal Christian on any tenet of theology is like catching a receding wave.
● Liberal Christians doubt Biblical inerrancy, with the caveat that some of it may be true.
● Accept the major tenets of evolution, cosmology and physics. With the caveat that we cannot know or explain everything.
● Doubt the existence of miracles or the efficacy of prayer. With the caveat that we cannot know or explain everything.
● Doubt the existence of Hell. With that small caveat.
● Doubt the exclusivism of Christianity (or Islam or any other Religion). With that small caveat.
● Doubt the idea that God intervenes in the affairs of human beings. With that small caveat.
● Some doubt that God even exists as any kind of 'Being' at all – content with the idea that God COULD simply be some kind of nebulous organizing principle that gives purpose to living things – rather like the Force in Star Wars before George Lucas fucked it up.
When pressed, the Liberal Christian will almost always yield ground and will almost always concede . . . with that small caveat of uncertainty.
In truth, most Liberal Christians are Cultural Christians and Theological Agnostics. The Cultural Christianity provides an excellent social framework where they can focus on the parts of the Bible they like – those that preach love and peace and fellowship and allows them to maintain a believe in their deep seated desire for life everlasting. While at the same time, their Theological Agnosticism allows them to discard all of the parts they don't like – the wrathful, petty, vengeful, interfering, bigoted, homophobic, misogynistic, child-killing, slave demanding, war-making, blood sacrifice demanding God. Ultimately, Liberal Christianity exhibits a preference for the form of Christianity rather than its substance.
While this seems to be reasonable and accommodating and understanding, it poses two problems. The larger problem is that far too many Liberal Christians allow their cultural affinity for Christianity to serve as an excuse to remain silent in the face of fundamentalist bigotry and intolerance. Far too few Liberal Christians are willing to speak boldly against the casual homophobia and intolerance that infects so much of fundamentalist Christianity.
Moreover, it is an ultimately empty, vapid and useless epistemological framework. Either our senses tell us true things about the Universe or they do not. If our senses tell us true things then we can use our senses and those we augment with technology to tell us true things about the Universe.
If our senses do not tell us true things about the Universe, then our knowledge of existence is reduced to GIGO where nothing is true, logic is meaningless and all epistemology is rendered useless anyway. While that is certainly an epistemic and philosophical possibility, it seems highly improbable given the degree of success we have in applying our sensory driven knowledge to the physical world. And even if our senses do NOT tell us true things about the Universe, given our flawed perceptions we would have no way of KNOWING they were wrong anyway.
The reality is that we DO know things about the Universe. Enough to apply the knowledge we have gained to send ships and satellites into orbit, enough to take detailed pictures of galaxies billions of light years away and analyze their chemical makeup, enough to facilitate virtual discussions via electromagnetic radiation transmitted via wireless signals all over the world, enough to crack our own genetic code. We know LOTS of things about the Universe and can do incredibly awesome things with that knowledge.
To be sure, we may never be able to have absolute, unequivocal, beyond any scintilla of doubt, KNOWLEDGE but to require that kind of knowledge is unreasonable, paralyzing and self-defeating. Especially when that standard of proof is ONLY applied to questions of the supernatural.