Sure cats kill because they want to. Think gun nut but with teeth.
In a typical ecosystem, not skewed by humans, the cycles of population growth and decline keep both the predators and prey in balance. Too many predators? The prey population declines and the predators starve. Too few predators? The prey population grows allowing the predators to also increase.
The bad news for birds is that people think cats are cute and feed them so they don't starve when the numbers of prey decline. If you like birds and must keep cats, keep them indoors. Or let them starve when they've killed all the birds in the vicinity.
In a typical ecosystem, not skewed by humans, the cycles of population growth and decline keep both the predators and prey in balance. Too many predators? The prey population declines and the predators starve. Too few predators? The prey population grows allowing the predators to also increase.
The bad news for birds is that people think cats are cute and feed them so they don't starve when the numbers of prey decline. If you like birds and must keep cats, keep them indoors. Or let them starve when they've killed all the birds in the vicinity.
So how, exactly, does God know that She's NOT a brain in a vat? 
