My question is directed to professing Christians who don't believe in any of the key doctrines held by evangelical churches, such as the Virgin Birth, the Resurrection, and Jesus Christ as the only path to salvation. If you believe in the evangelical doctrine of salvation, this question isn't for you.
I come from an evangelical background, which taught me to believe in the Virgin Birth, the Resurrection, and that Jesus is the only path to salvation. I understand that there are some Christians who don't believe in these things, which I think are the pillars and the cornerstone of Christianity, without which Christianity has no reason to exist. These Christians are commonly identified as "liberal Christians." You can read more about the view of this group of Christians here, and read a conservative theologian's response to their views here.
Back to my main question:
If one doesn't believe that Jesus is the only path to salvation, what is the "selling point" of Christianity? Why should people bother to become Christians at all? It would be equally okay to be an atheist, agnostic, or Buddhist who believes in Jesus as a great teacher and religion leader, but nothing more.
By the same token, as I see it, if liberal Christians think that Bible is just another book, written and compiled by mere humans with human errors in it, then it is no longer infallible, and there is no reason to pay attention to Biblical teachings on any subject. So what is the difference between liberal Christians and non-Christians? Non-Christians can draw inspiration from the Bible in the same way as these Christians do. They believe in exactly the same thing!
I am curious: On what basis do liberal Christians identify themselves as Christians?