I'm sorry that you're so spiteful. :[
What about killing people is
inherently wrong? In an atheistic view of the universe, I would respond that the only arguments against killing others lie in a social contract we have with one another not to kill so that it's less likely we'll be killed. I would not valuate the act of killing with "good" or "bad" as those terms are meaningless, since they'd differ from person to person and situation to situation.
I think a lot of the "mainstream" appeal of Christianity (beyond its pervasiveness in today's society) is the whole "love everybody/Jesus loves you" philosophy that is very much a recent development in a majority of Christendom. Despite any rosy depictions of the New Testament we might have today, much of what you'd hear on the pulpit two generations ago spoke heavily upon the "fire and brimstone" aspects of the Christian notion of the universe. Either can be used as effective means of social control; however, as is clear, the "love everybody" is clearly less sellable than "live in constant fear of perdition."
o_O This just sounds body-snatchers-esque...
I now direct your attention to
this thread I posted a long time ago as a response to my theological education. (Disclaimer: my beliefs may or may not have changed since then, but you may find it interesting)