ratiocinator
Lightly seared on the reality grill.
Nuclei decay because they lose energy over time.
No, they don't. Alpha decay, for example, is a quantum tunnelling phenomena.
The singularity is what people believe caused the universe to exist.
Some people, maybe, but not real scientists who study cosmology. As I said (why did you just ignore it?) a singularity is something that happens to the equations - it's not a physical thing. We don't know what happened at the start of the big bang because we haven't got a theory of quantum gravity.
Time would have to go backwards because that's what the universe going on forever in the past sounds like.
That makes no sense.
Because a singularity wouldn't have the mind to create everything with such precision and order.
Why do you think a mind is needed (you seem to be question begging)? You are also ignoring tha fact that you're trying to explain order and precision with more order and precision (in the form of your favourite version of god) for which there is no explanation.
What explains the order and precision of your god? If you don't think it needs explaining then you're just special pleading.
You could know that there's one God because one God explains all of nature existing.
Begging the question. How do you know?
How can the passage of time be an illusion but not time?
The passage of time might be an artefact of our perception. The best (well tested) theory we have tells us that time is a direction through a space-time manifold. That's what the solid evidence is telling us.
God exists outside of time and space. He told Moses I am that I am. Jesus told the Pharisees I am that I am. A self existing God has more explanation than the order of everything we see coming from a singularity.
But there's no explanation for why this god exists (rather than another one, many gods, no gods, just a universe, or nothing at all) so you've not actually explained anything at all by inventing a god, you've just moved all the questions around a bit....