"God is a murderer!" you might say if you don't think through the philosophical implications of your worldview. Many atheists object to God in this manner. God, the Author of life, has every right to end life. What obligates God to continue sustaining any life He gives? Nothing, of course.
Now, that doesn't mean God is not willing to sustain human life. Ignoring the obvious fact that He continues to do so, the Bible tells us repeatedly that God takes no pleasure in death, neither is He willing that anyone should perish. In other words, whenever you hear of God killing someone, even when we're talking about the vicious Amorites who sacrificed their children to their gods, you're not hearing about something God wanted to do. It's just that God is a God of justice; He must deal with sin.
Now consider this: You're probably not a vegetarian. Personally, I am by default, and although my personal circumstances have caused me to alter that lifestyle, the number one thing people say to me when I am a vegetarian and they find out is "I couldn't do that, I love meat too much."
Now, I'm not saying there's anything morally wrong with carnivory. Of course I'm not, I just confessed to partaking in it myself when it's convenient. If you want to eat meat, go for it. But I do want to point out that only a Christian can justify distinguishing between man and animals in this manner. Think about it: no one would be cool with "I couldn't do that, I love human meat too much" as a response to finding out someone is a vegetarian. But outside of faith, there's just no logical way to say a human life is more valuable than the chickens that go into a KFC boneless banquet.
So, basically, whenever an atheist argues that God is a murderer, they are being philosophically inconsistent. There is no argument they can give for why God should sustain human life. And every attempt they make would apply to the chicken, which they wanted to eat, as much as to the human, which God had no such desire to kill.
Thankfully for us, God does value us more than chickens. He has permitted us to eat chickens, but this is not the only death through which God provides us a benefit. Far from it, although we do deserve death for violating God's Holy laws, those same laws dictate that a worthy sacrifice can take our place. And because God has no pleasure in our death, He did provide that sacrifice. Jesus Christ, the Son of God, did not sin, and so He did not deserve to die. But He died anyway, taking the full wrath of God upon Himself. If we confess Jesus as Lord, and believe in our heart that God raised Him from the dead, we will inherit eternal life, and that is something that God does take great pleasure in.