I'm going off topic a bit, but you do realize that the big crunch is incredibly uncertain because we don't know the nature of dark matter, right? Not that it changes the overall question at all, as it would just be why would God create a universe that would eventually die through heat death (or other such endings) (plus it would be stupid to attack just the question because the question and meaning behind it was already answered by someone else).
That's the thing, we know so little and for anyone to sit down and even try to examine the theories is an exercise in absurdity.
The point is this, anyone trying to ask questions about "why does God..." anything is futile, because the very definition of God should be that we can't and shouldn't understand why God would do anything, and in doing so would blow our minds. On the flip side people who can't understand God, or throw around a bunch of science theories as the be all of the origins and ending of our universe is a hopeless moron. There are so many things I feel like typing about groups of people who piss me off with these topics but I have other, better things to do. But Know this, no one should presume to know anything about God, the universe, or anything in between, because we do really know so little. It's like trying to argue an ant can observe Humans then preach about human biology because it has used a telescope (as hilarious an image of an ant with a telescope watching me is).