If the simulation theory can be considered a religion ?
First of all it can not be considered a religion. It is more "hypothesis" than a "religion" Because it does not include a socio - cultural system, with no behaviour and practise, morals, beleifs, texts, sanctified places, prophecies, rituals and etc. Also terminologically you have to replace the "God" with AI which is also uncommon with any religion. The hypothesis does not include the "Afterlife" concept and any escathology so that it will be wrong to call it as a religion as well.
*wouldn't it be the only religion as it can help explain?
Lets assume the hypothesis is true. It can only prove that there is an intelligent and or supreme being who created everything and as a deistic perspective which proves that a creator exists.
and relate other religions and their history?
I assume your question is related with Mono-theistic religions.
Some religious scholars are against and some are neutral with this hypothesis. In terms with mainstream Abrahamic religions (Judaism, Christianity and Islam) you can find many contradictions with their scripture and beleif. But from perspectives of esoteric and mystic branches of religions such as Jewish mysticism, kabalah, gnosticism and sufism in general you may find some supporters.
Note that for Abrahamic religions simulator would be equivalent to the God of the simulation so you have to eliminate the terms such as AI, Alien or hyper-intelligence. Budhism however have elements consistent with the simulation hypothesis. But in general there is no prominent religion that believes the universe is a simulation.
Here are some arguments from Abrahamic Religions:
Christianity:
As it turns out, Scripture indicates that our earthly lives are only part of a larger whole, and there is a “real reality” above and beyond what we experience on a day-to-day basis. The Bible says our “reality” is created and designed. And yet, most who support “simulation theory” reject the idea of God, an afterlife, or other spiritual concepts. This is not dissimilar to how many atheists attempt to use evidence for the Big Bang Theory against biblical views, despite the fact that concepts like a “beginning” were once seen as antithetical to atheism itself.
https://www.gotquestions.org/simulation-theory.html
The simulation hypothesis can’t explain this any better than the atomic theory of matter does. Therefore, the simulation hypothesis changes nothing with respect to the third component of the Christian worldview—the soul.I thus don’t see how the simulation theory changes anything from a faith perspective. We still have the same three elements—God, the spiritual world, and the natural world—and all three interact.
https://www.ncregister.com/blog/would-it-matter-if-we-re-living-in-a-simulation
Did God create a simulated universe for us? The answer is, No!” Are we living in a glorified computer simulation? No! Our Creator made this universe. Someday He will destroy it and make a new one. While the universe, our world, its surroundings, and our bodies are all temporary, in contrast our spirits are eternal. Our bodies will change from this present life into immortal bodies at death and will live forever (Matthew 25:46; Revelation 20:11-15). Now try that with the characters in some electronic game! If you destroy or delete the game will the characters still exist?
https://www.neverthirsty.org/bible-qa/qa-archives/question/simulation-theory-did-god-create-a-simulated-universe-for-us/
Islam:
The Simulation Hypothesis is but one small branch of the giant tree of materialism. The roots of this tree lie not in science, but in atheism—an allergy to anything Divine, and by extension, anything non-material or unseen. It is part of a cultural zeitgeist that tells us that we are machines, programmed by our genes, acting out our predetermined roles, functioning by the chance interplay of impersonal laws. Such a worldview has no foundation in the true spirit of science, but rather emerges out of a type of blindness—dazzled by the bright successes of modern physics, we see its afterimage in our vision wherever else we look. But progress in reductive physical science does not mean that its principles apply universally.
https://www.ahmadiyya-islam.org/articles/the-simulation-hypothesis-is-wrong-humans-are-not-machines/
Do you not see that Allah has created the heavens and the earth with truth? If He will, He can remove you and bring (in your place) a new creation! (Surah:Ibrahim Verse No:19)
We have not created the heavens and the earth and all that is between them in play and fun. (44:38)
https://quran.com/
Understanding and interpreting the behaviors
prohibited in the Qur'an and hadiths within simulation will ease to understand what is religious and what is simulation formed for religion but incompatible with religious truth. Simulation theory is actually a critique towards the process started with modernization.
Trying to understand Islamic concepts within this theory will also show how these concepts were shaped in the process started with
modernization. Perceiving behaviors such as hypocrisy, hypocrisy and polytheism, which can be expressed as simulation, within the
framework of simulation will contribute to a better understanding of the essence of religion in the modern world
https://theology-ataunipress.org/en/personality-types-critized-in-the-quran-within-the-context-of-baudrillards-simulation-theory-and-seeking-the-reality-in-the-modern-world-161511
Judaism:
But no, we aren’t an imaginary figment—we are a reality. Because that capital R reality is invested within us and within each creation—something no mortal imagination or simulation could achieve.
https://www.chabad.org/library/article_cdo/aid/615042/jewish/Am-I-just-a-Figment-of-Someones-Imagination.htm
Yes, we are indeed living in a simulation, just not the one that the simulation theorists imagine. A basic tenet of classical monotheism is that in order to provide the correct training ground for ethical development, a dimension had to be created that masked the true and ultimate reality—which is infinite and wholly spiritual. This mechanism allowed for free will to exist and afforded humanity the opportunity to make moral decisionsThese theorists are essentially substituting one massive (alien/programmers) power for another (God). It would seem odd that these programmers are capable of creating a program of seemingly infinite complexity but couldn’t keep the Fruit of the Loom logo straight and therefore had to go back and tinker with it.
https://aish.com/is-elon-musk-right/
could you elaborate on how would simulation theory be categorized as a cult.
There isn't an excessive obsession with it as far as I am aware. Couldn't even put statistics on the number of believers or partial believers.
– Mel Feb 13 '19 at 03:01Hasn't gained much traction among conspiracy theorists No one has been killed in the name of simulation theory