my 0.02
First I’m going to assume the accuracy of the Bible’s account of Jesus for the purposes of this thread. The Jesus depicted in the Bible is the Jesus people turn to for moral guidance, so that’s who should be discussed, even if we don’t know the relationship of Bible Jesus to the real Jesus. Besides there are people who base their morality on John Galt, a wholly fictional character, so discusing a morality that is attributed but not proven to belong to Jesus does not seem that unreasonable.
First I’ll say that I’m struck by the general compassion shown by Jesus in the Gospels. “Let he who is without sin cast the first stone.” “Whatsoever you do to the least of these you do to me.” “Judge not, lest ye be judged.” Jesus’ imperative is not just to behave morally, but to actually be compassionate, which is a far different thing. I can see why the Muslims would refer to him as “the prophet of the heart.” (And thanks pravnik, I did not know that.)
However, the other thing that strikes me are the terrifying demands Jesus lays on his followers. Take the command to turn the other cheek. At first glance this just seems like an injunction to walk away from a confrontation, sound general advice we’d all agree. But look at what he’s saying. Don’t just walk away, actually turn to get punched again. If someone steals some of your stuff, don’t just write it off, give him even more of your stuff. And look at the ultimate commandment. The Golden rule just tells us to do unto others, in other words to act benevolently and to keep other peoples well being in mind. (Frankly, I prefer Kant’s negative formulation but that’s another story.) Jesus on the other hand tells us to Love our neighbor has ourself. Is that even possible? Can one really have as much concern for every single person in the world as one does for his or her own life. I think that to even attempt this level of interest would drive one insane. Every atrocity, every bad thing, Katrina, Darfur, 9/11, whatever, would all have to be felt on the same intense level as if it were happening to you personally. I think this is impossible, even for good-hearted people.
There’s something C.S. Lewis said once that made sense after hearing some Paul bashing. He said something like "Everybody praises Jesus and criticizes Paul. But When I read the teachings of Jesus I am terrified of the demands he places on me. Paul humanizes Christianity and makes it a religion one can practise in the world.
In short while I find Jesus a moving teacher, and one who touches the core of the human heart, I too find his morality terrifying and impossible. I do not believe his moral teachings can be seperated from his spiritual mission and his belief that he was not of this world.
Again, I make no claim to scholarship. These are just my impressions from reading the New Testament.