The real question of interest isn't whether there's a God. This is an argument that is unwinnable. Those of faith don't admit to pure analytical reason as their ultimate epistemological determinant, while atheists have the impossible task of directly proving a negative. In order to prove that God doesn't exist, you'd have to provide a provable naturalistic explanation for every single thing that happens.
No, the real question is should anybody's mere beliefs be sufficient to marshal the force of law to enforce them. St Thomas Aquinas said law without justice is no law. The same could be said of law without fact.