Just a word of caution: There is some confusion in the popular literature on the Internet about so-called "zero point energy" and fluctuations in the vacuum. Properly speaking, the words "zero point energy" should probably be banned, because in professional theoretical literature this has referred to the energy of the ground state of a system at absolute zero. The ground state is not vacuum; the ground state is an energy eigenstate. [The electronic ground state of a hydrogen atom, for example, is the energy eigenstate in which one electron has its minimum spherically symmetric average distance from the proton.] As such, a
ground state has real existence and real non-zero energy. The vacuum is something else. It arises when you apply an annihilation operator
to the ground state, destroying it. It does
not have definite energy, and does not contain real particles.
I don't understand why you'd be uncomfortable with a God whose mere Word -- the Laws of Universe -- would in itself be sufficient to cause the universe to create itself. God is not substantially removed from the process of creation by that modality. Indeed, it seems to me to identify the ongoing process of creation -- countless particles spring out of the vacuum and return to it in your own body every second, for example -- with the sustenance and guarantee of the Creator.
"I don't understand why you'd be uncomfortable with a God whose mere Word -- the Laws of Universe -- would in itself be sufficient to cause the universe to create itself." Actually that is my argument. What I am trying to say is that without G*d the universe is not possible. Something from nothing violates the laws of physics. I also believe that the Big bang might not have in fact been the beginning of everything. Our universe probably, everything? I doubt it.