Biblical preaching that ostracizes and condemns even the most well-intentioned of Christians will never unite us in effecting any kind of positive change. It will only further divide and separate people into groups, where it becomes yet again a battle of who can protest the loudest that their views are intrinsically right and universally applicable. By invoking a higher authority that no one can truly consult, religion uses the same argument in response to every issue. And all this according to someone who feels a real community with God and considers herself a Christian! Yet if a lot of these points make me feel judged or belittled, what hope do they ever have of reaching others or helping to improve the provision of basic human rights for people worldwide? No matter how much someone claims to be flawed themselves, by passing on what he or she believes to be the mandate of Christ, that person automatically takes on a condescending tone to the rest of humanity. How will this person spread the good things that spirituality is intended for? This seems to be a poor reflection of Christ's unconditional love. And so we will go around and around in circles without ever really convincing each other of the right way to live our lives and govern ourselves and others.

I haven't read the book mentioned below, but the synopsis is eerily relevant, and it's been consistently in the top hundred most sold books on Amazon. People are thirsty to feel forgiven, not to receive inadequate health care or be morally denounced for political reasons.
What Jesus Meant, by Garry Wills
http://www.amazon.com/gp/product/0670034967/ref=pd_ts_b_59/104-3569908-8013528?s=books&v=glance&n=283155