Hi gkc. Speaking from the position of someone who does believe in God (which makes me a minority among physicists)...
There are two issues here. The first is the consideration of God's role in the universe when we do science. A lot of people believe that God should be given credit for all physical processes (that isn't exactly what you said in your post, but I'm guessing you adhere to this philosophy). The problem with saying "God is responsible" is that from a scientific point of view, it's an absolutely useless statement. If you believe in a God who is actually worthy of that title, then you believe he is responsible for everything that happens. So why bother mentioning this at all? It would be impractical to glorify God for every single physical process that has to be considered in any scientific experiment. Besides that, science is concerned with "how" question, not "why" questions. Saying "God did it" adds absolutely nothing to an explanation of how diffusive shock acceleration creates high energy cosmic rays or how stars collapse into degenerate matter. For any religious scientist who is good at his job, giving God credit for physical processes would not be beneficial in any way, because you'd have to take the time to give God credit for every single thing that happens. Even according to most theologians this would be a waste of time rather than God-honoring. If you are a scientist who believes in God, it's better to take time, outside of your research, to give credit to God in whatever way you feel is best. But as far as scientific inquiry goes, there's no point in inserting the word "God" into your scientific papers. That's just meaningless.
The second issue is using religious doctrine to formulate scientific theses. You mention evolution and the formation of our universe from others. The latter is highly speculative (almost to the point of being a religion rather than science), so I won't go into it. But as for evolution, biologists have physical evidence backing up their theories. This isn't just a matter of evil atheist conspirators sitting in back rooms trying to figure out how to drag more people to hell with them. Lots of religious people believe in evolution. Even if you don't, it's contrary to the doctrines of most religions to make up lies in order to defend one's beliefs. Don't take this as any sort of personal offense, but basically all creation "scientists" are liars. I have never met one creationist who used legitimate scientific facts to make even a mildly convincing argument against evolution. If you try to negate physically observable facts, you're bound to lose.
As a theist I'm probably a bit more sympathetic to the creationism people than most (even if I don't agree with them). If you've got a legitimate argument against evolution, I'm willing to hear you out. All I ask is that you not go to the Answers in Genesis page and quote from their laughable arguments, or use some other already-refuted argument against evolution. I'm speaking somewhat rhetorically here; in evolution's 100+ year history, no one has come up with a valid argument against it. But hey, there's a first time for everything.