In the West, "God" can be assumed to mean the god of Abrahamic monotheism unless another definition is provided to indicate otherwise, which god is the angry, judgmental deity that disesteems man and nature and issues threats and commands from outside of and above nature (not just extra-natural, but super-natural) while explaining which of us are abominations that offend it and need punishing.
In my experience, polytheists tend not to use the word except in the plural and uncapitalized, as in "the gods" or "the god of fire." These are not universe creators nor are they considered sacred in place of nature.
In the end, I let the theist define what it is he says he says that he believes exists, and then tell him why I don't believe what he believes however vague his description. Maybe he says God is love or the laws of nature. I tell him that I already have names for those, and God isn't one of them, which invariably becomes transformed into a claim that no gods exist because I reject his version of a god.
I have no problem with the deist god, and do not claim that it doesn't exist (which is why I call myself an agnostic atheist), merely that I don't believe that such a god existed and that the question is neither decidable nor relevant (apatheism) even if we could get an answer. Nothing changes either way if we discover that our universe was intelligently designed to work on autopilot with no day-to-day divine supervision present or needed.
A person who does not believe in God is essentially saying there can be no other species that is superior to himself.
Not at all, however you define superior, which presumably means more intelligent in this context.
You are saying there is no planet in the Universe where the inhabitants have better brains and better abilities (which we may not even be aware of yet) than humans on Earth?
To my knowledge, only some Abrahamic theists make that claim - the ones who are anthropocentric and see the universe as having been created for man - God's unique and special creation who sits in the center of reality for whom it was all created and about whom it all revolves. The atheistic humanist makes no such claim, and expects that there are or were greater civilizations than man's out there in the cosmos. But these are not the supernatural universe creators that theist claim exist and which claims atheists reject.
who knows and has established that all theology comes from humans
I define theology as the thinking that emanates from the assumption that a god exists (and in the West, usually that it has left a written testament). Those ideas come from human beings, and it's all useless if the god premise is false, and even useless if it isn't.
How did Judaism evolve to Christianity to Islam?
If Judaism is Happy Days, Christianity is Laverne and Shirley, Islam is Mork and Mindy, and Baha'ism is Joanie Loves Chachi - spinoffs.
Science and repeated experiments cannot test for the truth of events in history.
That is incorrect.
If we assume that no miracles happened then we can dismiss any historical document with miracles in it
We don't need to assume that no miracles happened to dismiss the claim that they do.
That is something that science might do in searching for naturalistic results, but it does not tell us that the naturalistic answers are definitely what happened.
Nor need it. Naturalism is sufficient. No observation requires the existence of a deity to account for it, and none is better explained invoking a deity over naturalistic alternatives. If you're looking for a reason to believe in your god, you won't find it examining nature, which I think you understand. That explains all the claims that this god lives outside of time and space and can't be detected, because nothing that happens can be said to need a deity to have occurred.
If people experience things that are generally impossible in real life, they would see them as miracles and that does not mean that they were deeply irrational.
Irrational means not arrived at using reason. That's not an insult. Perhaps you would prefer the word nonrational. Intuitions, like the experience of beauty during a sunset finding a joke funny are irrational, because we didn't come to those conclusions using reason. That's why we can't explain why we come to these conclusions. Unseen neural circuits employing unknown algorithms just inform us how we feel without showing their work to consciousness, just the conclusions. They tell me that strawberries taste good to me and liver bad. Neither of those ideas is derived from reasoning. Where reasoning comes in is knowing how to repeat those experiences.
Jesus was prophesied in the Hebrew scriptures.
No, he wasn't. The Hebrew messiah was prophesied, a mortal man and not an alleged demigod who would leave the world as he found it largely unknown and unremembered without the help of people like Paul and Constantine.
I don't believe the stories of Gajendra. Do you think that because I believe the gospels that I should believe all miracle stories?
He probably thinks you shouldn't believe any of them, and that if you believe any of them, you should have a rational criterion for accepting this claim while rejecting that one.
the Jews of the time of Jesus used their own cultural prophecies to show that Jesus is the Christ
Disagree. The tried to graft the history of Jesus onto messianic prophecy, and in so doing have generated specious arguments that convince nobody. Nobody at all looks at that scripture and the description of Jesus and says one describes or predicts the other. Only people that already accept that by faith a priori agree that it does.
Jesus came with the truth for all people
I don't possess a single belief that I would call truth that came from Jesus. There is some overlap in our values such as support for the Golden Rule, but I don't call such things truths, and they didn't come from scripture. They're moral intuitions of the circuits we call the conscience, which also deliver intuitions to consciousness without showing their work. They tell me what matters to me, and I defy those intuitions at my own peril, as those same circuits reward and punish the self just like a god according one's compliance with its moral imperatives.