So the reason there is a God, is that there must be a reason everything is created. I have tried to find out why that must be so, but have not come up with it. The only reason I could think of why people are saying this is that it might feel better for us humans that there is a reason.
If you assume causality, eventually you reach the problem of Primus Motivator. If the universe expands because of the Big Bang, what caused the Big Bang? What caused that thing to cause it; why did it do it?
Causality is such a fundamental concept that it is nearly impossible to consider a universe without a cause. Consequently, some funky research has been done on it in physics, but I haven't read any of it.
One thing most people forget is that we simply don't have much information about the universe. All we know about it is what we can see from our pale blue dot.
For all we know the big bang never happened and the reason the galaxies seem to be moving "away" is because we are in a current of moving galaxies. (And the universe is truly infinite not only space but in mass.)
