What makes you think human life deserves respect? Or do you think human life
deserves respect (from God)? If yes, why?
I don't think there is a god, so I guess the question is disqualified. But I'll answer the first part anyway: Yes, human life deserves respect. The strong must protect the weak, because society demands it. And because of that altruism, we show just how amazing a creature we are. We are the first species on this planet than can curb natural selection by actual preventing those otherwise unable to survive to do exactly that, and that archetype alone would demand respect from any god.
But since you are obviously a theist, let me ask you this: Why wouldn't we deserve respect?