So your friend tells you god created everything and chose you to get diabeties. What do you say to them?
When I have these conversations with the "belivers" the only thing I try and do is present the evidence, let them make up their own mind. It is much harder for a non-educated adult to understand verus a child which goes into our educational system (different topic :-p).
The very short answer is, there is no intelligent design its darwinian evolution. Now most people would say, but Ross I don't see a human with a tail, or where is the "missing link", or shouldn't we be seeing evolution in front of our eyes? again ignorance, let me clear a few things up
First, evolution has been proven multiple times by darwin (finches and dogs) on a smaller scale and on a large scale takes hunderends of thousands to millions of years, which includes natural selection during the same time.
Natural selection example:
There are 5 different spiecies of roses, back hunderends of thousands of years ago. Plant eating animals would start eating these roses in order to survive. So over the course of hunderds of thousands of years the roses would take on different traits to protect themselves, a smell, a color, or a thorn on the rose. Once these traits evolved on the specific roses, the one with the better evolutionary charteristis would win out aka the rose with the thorn on its stem to prevent from being eaten.
Evolution as WE know does not happen over night its very very small changes over a very long period of time and when you throw in natural selection this is where we come out on top, by random chance and entropy.
Second, there is a big misconception that we orginiated from chimps, this is false we are actually cousins.
Chimps and Humans orgianted from the same ancestor which, no longer exists
There are, or you can say were, 6 diffrent species of humans, us being homo sapiens were actually the 2nd most intelligent (second biggest brain), but due to natural selection, random change etc we were the species that survived and again the other 5 species bones/fossiles have been FOUND and no longer are living
I can go on further if needed but that is the basics, the hard part is giving examples so they actually understand