Yes, it is true that our God created all things perfect, but since he allows--for a variety of complicated reasons--for things to go on as they do, then, in a way, he has to take responsibility for the imperfections of our otherwise perfect world.
Let's face it, if God wanted to stop all pain and death right now, he could. God's hands are not tied. There must be valid reasons why so many negative realities continue to exist. Let's try to analyze what some of them might be.
Some conservative Christians believe that God allows the controversy between good and evil to continue to protect man's free will. Conservatively speaking, you have to admit that 6,000 years is ample time to show that God offers humankind his way or the other fellow's way.
Progressively speaking, however, we are not talking about 6,000 but millions of years for this cosmic struggle between good and evil to have been resolved.
This brings us to the subject that the title hints at. Does God bring about life, humankind's life specifically, through the death that is essential for natural selection and the survival of the species? It is, after all, only the strong that survive to procreate and pass on their genes to the next generation. How can a God of love possibly be responsible for a system that uses death in order to bring about life and complex organisms?
The Bible account is very simple: God creates all of our reality in six days and rests on the seventh day. For those who have a problem with such simplicity, then the only other option is that God used evolution, and before that--the Big Bang--to create our world and the cosmos. Because this would make God the author of death--and life--such a paradigm is not consistent with a God of love.
The third possibility we will not focus on very much other than to state, for the occasional agnostic who may wander in by chance, that evolution, life, death, etc., have nothing whatsoever to do with God, only with humankind.
So where does that leave us? Perplexed? Frustrated? Despairing? Not at all; there is a fourth explanation. We all think this is all happening to us. This dream called life, death, rebirth. The incredible reality is that we are dreamers twisting and turning--sometimes smiling and laughing--through a long dreamlike state called life and death. One day we will awaken and learn who God really is and why all this death and life and rebirth were necessary.
Until then, look to God and worship him for the hour of his judgment has come.