I've seen all of that and I am still not aware of a peer reviewed paper whose premise is "something from nothing", but I agree with your statement about multi-verse theories not necessitating an infinite past. You are safe saying that "all of our known physics can only lend credence to ex nihilo", but science and God are two different slices of the same big mysterious pie, lol.See the references on the wiki for zero-energy universe. Krauss, Guth, Hawking, etc., including a link to a paper. Even multiverse theories do not necessitate an eternal universe. All of our known physics can only lend credence to ex nihilo, without a god, but feel free to provide any peer reviewed paper that supports an eternal universe. Eternal universe schemes are usually nothing more that infinite regressions, where any initial cause is only avoided rather than explained away.
Everything else rests on the veracity of your initial assumption. If that is erroneous, so is everything which follows.
As for everything resting on the veracity of initial assumptions, that is true in a discussion where people are arguing their premises with each other by offering evidence and philosophy, but when discussing a persons view of God, it seems to boil down to faith. Faith is the personal element that is based on the sum of what you have learned in life and indicates a conscious effort to have chosen what you believe in. I give credit in terms of respect for that act of choosing, as long as your choice does not cause careless harm to others; you can exercise your free will any way you want as far as I'm concerned.
And the concept of Eternal Intent is derived from my layman views of physics and cosmology which have a starting point in the choice of one of three major explanations for the presence of the universe: God did it, something from nothing, or there was no beginning. I have made a personal choice based on my own individual learning and contemplating, and of course my philosophy reflects my personal beliefs.