Casting aside morals that have been fabricated by man, for the purpose of man, I don't think there's anything intrinsically wrong with killing someone, even at random. Admit to this, and people will think you're nuts, immature, need help, or simply a terrible person. Why though? Consider the fact that natural events claim hundreds of thousands of lives every year, and with complete indifference. A lot of people believe in the omniscient/omnipotent god that created the universe, and if such a god were to exist, would he not be directly responsible for those deaths? Worship a god that kills millions, but abhor someone who feels killing is not intrinsically wrong?