Tytan said:
I As you pointed out, the idea of the Christian God lying to make up a religion, and all the gods and goddesses competing for followers, makes no sense. But for those who believe in many gods, it is the only way to explain and justify what they see.
I'm a proponent of this view, and I think it does make sense.

You are right in your appraisal of how it's arrived at. We start with certain assumptions, including polytheism. And any theory must be made to fit the facts. And the theory that best fits the facts of Christian history is that Yahweh is competing with the other gods, and his strategy involves telling humans that he created the universe, is the only god, etc.--lying, in other words.
I said I think it makes sense, and here's how. The gods have connections to particular cultures. An important principle here is "as above, so below"; things and events in the supernatural world have a corresponding effect in the natural world, and vice versa. So the things that happen to our cultures correspond to things that happen among the gods.
An important trend in cultural history is globalization. Cultures are drawn into contact with each other, and tend to cover greater and greater amounts of territories. By the law of AASB, the same must be happening among the gods. Now one consequence of globalization is increased competition. To be a local news reporter, I just have to be the best applicant in my city, but to be on CNN, I have to be the best in the US. Mythology tells us that the gods have some degree of competition anyway, so it would get more intense if there were more rivals to compete with.
That's a general explanation of why you should expect to see competition among the gods, and I consider it to make sense. It's just as profitable to focus on Yahweh's particular character, his traits that led him to come up with such a strategy. In the negative, there's jealousy and megalomania, and in the positive, he does have a genuine passion (like many other gods, but Yahweh especially) to remake the world into a more benign place, for both our sake and his. No doubt it's clear that these tendencies both have effects on the realms Yahweh rules, and in divergent directions. I have a lot of respect for Yahweh; don't get any idea to the contrary.
As for his strategy of creating a religion that misleads its followers, I think it unarguably made sense. As the saying goes, if it's stupid but it works, it isn't stupid. If you ask why one should prefer the "lies to gain followers" theory to the Christian theory, the simplest answer is the very concept of the Jews being Yahweh's "chosen people." This is essentially similar to other gods who formed an alliance with particular human societies, but what's even more telling is that he was for the most part unknown among the Gentiles. His religions spread by human word-of-mouth just like other religions. In other words, he claims to be the god of the whole world, but the method he used to prove it is one that any localized god could have accomplished just as easily! Interesting, isn't it?