Probably you'll never read this now, but... Nope. Everywhere at once literally means a privileged reference frame. "Over there, now" is a concept with no logical meaning in our physical universe. Being in two places at once isn't physically impossible, it's just nothing.
And that imposes very serious constraints on God. If I am on the Earth and I pray for my husband on Mars, God on Mars can not hear my prayer until it is too late. You really think that's a statement most Americans agree with?
You're also off about light. Light is not "everywhere at once from its own perspective" as you seem to think. The fact that light cannot be everywhere at once is the same fact that dictates that light cannot have a point of view, that light experiences no time and has no perspective. (Mind you, if this is the comparison you would like to draw to God, I will happily assent.) Study up and be a bit more careful with your science, and you'll be able to throw much meatier punches theologically.
Everywhere at once means "no privileged reference frame". (Kind of like how light, from the point of view of light itself is everywhere at once, and light also has a the special privileged reference frame of no reference frame at all.)
You were the one who claimed the most people believe in a privileged reference frame based on God. Not me. Now you are backpedaling from that claim - which is fine, because not only do most people not believe that, it doesn't even make any sense.
And I agree that this should conclude the religious digression of the main topic. Not that there is a whole lot more to talk about, unless you want to talk about (argue with?) my comment above on light.