You see this manifestation in a person who's very existence is in serious doubt.<quoted text>
As a Christian, I see this vested interest manifested in the person of Jesus Christ. What better way for God to enter our world and interact with us than in a personal way. As a living breathing person who eats, sleeps, feels pain, feels our sorrows, our joys, etc, etc.
As for the subjects you bring up, those are perfectly valid natural events to discuss with regard to the existence of a personal God.
It all goes back to "the fall." In Christian theology, Adam and Eve were ejected from the garden, and God withdrew His presence from our world. For your consideration, think on this if you will.
If God's attributes are that of love, light, and sustainment of eternal life, then it logically follows that if God withdraws His presence from our world, we lose that sustainment of light, love, and eternal life. Everything starts to break down. We start to see animals eat each other. We see gradual decay and disease, chaos, irregularity, atmospheric turbulence. All of nature is out of sync.
Now it really is survival of the fittest as Darwin suggested, but because God withdrew from our world and not because there isn't a God.
I'm aware you may not see it this way, but that is the way I understand it.
If we're to believe the Revelation of John in any literal sense, it would have to be with his vision that peace and harmony in nature would be restored so that the lion and lamb truly could co-exist.
Since you seem to put so much stock in this epic "Fall" then you must have information on the approximate time period this occurred. Can you position this event sometime in Earths history? It might also be helpful to know exactly where this Garden was located. The time frame is much more important so we can find a time in Earths history were animals began eating each other. If we can establish that time frame we can sync it up with what Paleontologists know about early animal life and their eating habits. It would go a long way towards actual evidence for exactly when God chose to withdraw his presents. Do you have information on what point in Earth's history were God decided to withdraw his presents? As soon as we have these time frames established we can continue with our dialog.