/u/MindOfStraw, are you seeing this?

Buddhism is not polytheistic. The idea exists that there are gods and demons and such, but they are non-central to the main idea of the religion. Buddhists don't worship gods, nor do they believe in them; which is what makes them nontheistic. If they straight up rejected the idea of gods and said that they don't exist, that would make them atheistic. Gautama was 100% human (when you look at him from a Buddhist perspective), so he really doesn't fit in with the rest of the "assembly of gods."

This is so incorrect, I don't even know where to begin. For starters buddhists do worship gods, because buddha is a (super) god. Second, there is no prohibition on worshipping the other gods, its just not central to the practice, so the option being open to you isn't that different from other polytheistic religions where you can ask specific gods for gifts, but its not required. Third, saying you don't believe in something that you think exists is weird sophistry of words. Fourth, buddha was a human at one point, but as the buddha he's not. There's no form of buddhism until modern secularization where the buddha was interpreted as a regular human after enlightenment, especially considering he was seen as having very particular supernatural physical characteristics, and performing miracles. The entire point of his ambiguous way of referring to himself after enlightenment is that he's something that's not entirely definable since its beyond any other samsaric life. Buddha is literally the very central part of the religion, since worshiping the Buddha is one of the three jewels. It wasn't until mahayana that people began interpreting that jewel metaphorically, and in mahayana they are even more obviously gods than in theravada.

I don't see how this is even remotely similar to Gautama. YHVH is seen as the creator god in Judeo-Christian belief. Even if the idea of his perfection is more or less rejected, that doesn't take away from his power as the god. Hell, in a lot of non-Abrahamic religions, gods are seen as imperfect and mortal just as humans are. They just have a much longer lifespan and are much more powerful.

The point is that in a fictional universe where characters are taken slightly out of their religious context, and their offhand declarations of perfection that they make are considered to have been misleading, there would then be no reason to not place buddha alongside other gods to some extent. Since the things which make him distinct, like those which make YHVH distinct are implied to be exaggerations. Or at the very least, not quite as distinct as they claim, even if still somewhat distinct.

Deification goes directly against the idea of Buddhism, so I don't see why they would do that, unless they really don't care about sticking to the basic principles of the religion. I mean, they generally do take some liberties with the deities, but this is less of taking liberties and more of reworking an entire religion just to fit in with the game.

The idea of buddhism literally involves someone going from a human to the highest level of divine entity, followed by being worshiped. In fact, in the shorter sense, people can go from humans to mid level gods all the time. So you are wrong on multiple levels, seeing as how in original buddhism all gods are in a sense the result of deification.